Common Weakness Enumeration

CWE-787

Allowed-with-Review

Out-of-bounds Write

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product writes data past the end, or before the beginning, of the intended buffer.

15663 vulnerabilities reference this CWE, most recent first.

CVE-2026-20493 (GCVE-0-2026-20493)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:06 – Updated: 2026-08-03 19:47

Summary

In wifi, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: BORA00154903; Issue ID: MSV-7575.

Severity

4.4 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-03 19:46 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT6890 Affected: MT6988 Affected: MT6990

Show details on NVD website

JSON

To clipboard

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CVE-2026-20491 (GCVE-0-2026-20491)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-03 18:58

Summary

In med, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981478 (Note: For MT6890, MT6990, MT6988) / AUTO00851173 (Note: For MT2735, MT2737); Issue ID: MSV-7652.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-03 18:57 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT2735 Affected: MT2737 Affected: MT6890 Affected: MT6988 Affected: MT6990

Show details on NVD website

JSON

To clipboard

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CVE-2026-20485 (GCVE-0-2026-20485)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-05 03:56

Summary

In HFRP, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11049569; Issue ID: MSV-7931.

Severity

6 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-04 00:00 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT6993

Show details on NVD website

JSON

To clipboard

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CVE-2026-20481 (GCVE-0-2026-20481)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-05 03:56

Summary

In geniezone, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10965373; Issue ID: MSV-6935.

Severity

6 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-04 00:00 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT6989 Affected: MT8755 Affected: MT8768 Affected: MT8771 Affected: MT8775 Affected: MT8781 Affected: MT8791T Affected: MT8792 Affected: MT8793 Affected: MT8796 Affected: MT8797 Affected: MT8798 Affected: MT8799 Affected: MT8910

Show details on NVD website

JSON

To clipboard

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CVE-2026-20478 (GCVE-0-2026-20478)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-03 19:08

Summary

In Audio HAL, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981454 (Note: For MT6880, MT6890, MT6988, MT6990) / AUTO00851293 (Note: For MT2735, MT2737); Issue ID: MSV-7638.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-03 19:07 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT2735 Affected: MT2737 Affected: MT6880 Affected: MT6890 Affected: MT6988 Affected: MT6990

Show details on NVD website

JSON

To clipboard

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CVE-2026-20477 (GCVE-0-2026-20477)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-05 03:56

Summary

In display, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11009963; Issue ID: MSV-7658.

Severity

6 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-04 00:00 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT6991 Affected: MT6993 Affected: MT8188 Affected: MT8189 Affected: MT8668 Affected: MT8676 Affected: MT8678 Affected: MT8781 Affected: MT8799 Affected: MT8910

Show details on NVD website

JSON

To clipboard

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CVE-2026-20476 (GCVE-0-2026-20476)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-03 19:07

Summary

In ccci, there is a possible out of bounds read due to a missing bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981532; Issue ID: MSV-7660.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-03 19:07 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT6813 Affected: MT6986 Affected: MT6988

Show details on NVD website

JSON

To clipboard

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CVE-2026-20475 (GCVE-0-2026-20475)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-05 03:56

Summary

Severity

6 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-04 00:00 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT6991 Affected: MT6993 Affected: MT8126 Affected: MT8171 Affected: MT8188 Affected: MT8189 Affected: MT8367 Affected: MT8668 Affected: MT8676 Affected: MT8678 Affected: MT8766 Affected: MT8768 Affected: MT8781 Affected: MT8786 Affected: MT8791T Affected: MT8799 Affected: MT8910

Show details on NVD website

JSON

To clipboard

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CVE-2026-20472 (GCVE-0-2026-20472)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-03 19:05

Summary

In TFA, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10991467; Issue ID: MSV-7764.

Severity

4.4 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-03 19:05 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT6982VB Affected: MT6986 Affected: MT6986D

Show details on NVD website

JSON

To clipboard

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CVE-2026-20471 (GCVE-0-2026-20471)

Vulnerability from cvelistv5 – Published: 2026-08-03 02:05 – Updated: 2026-08-03 19:04

Summary

In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10991588 (Note: For MT6880, MT6890, MT6990, MT6988, MT6986, MT6813) / AUTO00851171 (Note: For MT2735, MT2737); Issue ID: MSV-7790.

Severity

4.6 (Medium)


                        
                          CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-03 19:04 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

MediaTek mitre root

References

1 reference

URL	Tags
https://www.mediatek.com/product-security-bulleti…

Impacted products

1 product

Vendor	Product	Version
MediaTek, Inc.	MediaTek chipset	Affected: MT2735 Affected: MT2737 Affected: MT6813 Affected: MT6880 Affected: MT6890 Affected: MT6986 Affected: MT6988 Affected: MT6990

Show details on NVD website

JSON

To clipboard

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      {
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          {
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              "attackComplexity": "LOW",
              "attackVector": "PHYSICAL",
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              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-20471",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-03T19:04:13.222828Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-03T19:04:40.680Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "MediaTek chipset",
          "vendor": "MediaTek, Inc.",
          "versions": [
            {
              "status": "affected",
              "version": "MT2735"
            },
            {
              "status": "affected",
              "version": "MT2737"
            },
            {
              "status": "affected",
              "version": "MT6813"
            },
            {
              "status": "affected",
              "version": "MT6880"
            },
            {
              "status": "affected",
              "version": "MT6890"
            },
            {
              "status": "affected",
              "version": "MT6986"
            },
            {
              "status": "affected",
              "version": "MT6988"
            },
            {
              "status": "affected",
              "version": "MT6990"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10991588 (Note: For MT6880, MT6890, MT6990, MT6988, MT6986, MT6813) / AUTO00851171 (Note: For MT2735, MT2737); Issue ID: MSV-7790."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787 Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
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          ]
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      "providerMetadata": {
        "dateUpdated": "2026-08-03T02:05:23.046Z",
        "orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374",
        "shortName": "MediaTek"
      },
      "references": [
        {
          "url": "https://www.mediatek.com/product-security-bulletin/August-2026"
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374",
    "assignerShortName": "MediaTek",
    "cveId": "CVE-2026-20471",
    "datePublished": "2026-08-03T02:05:23.046Z",
    "dateReserved": "2025-11-03T01:30:59.015Z",
    "dateUpdated": "2026-08-03T19:04:40.680Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Mitigation MIT-3

Requirements

Strategy: Language Selection

Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer.
Be wary that a language's interface to native code may still be subject to overflows, even if the language itself is theoretically safe.

Mitigation MIT-4.1

Architecture and Design

Strategy: Libraries or Frameworks

Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Examples include the Safe C String Library (SafeStr) by Messier and Viega [REF-57], and the Strsafe.h library from Microsoft [REF-56]. These libraries provide safer versions of overflow-prone string-handling functions.

Mitigation MIT-10

Operation Build and Compilation

Strategy: Environment Hardening

Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.

Mitigation MIT-9

Implementation

Consider adhering to the following rules when allocating and managing an application's memory:
Double check that the buffer is as large as specified.
When using functions that accept a number of bytes to copy, such as strncpy(), be aware that if the destination buffer size is equal to the source buffer size, it may not NULL-terminate the string.
Check buffer boundaries if accessing the buffer in a loop and make sure there is no danger of writing past the allocated space.
If necessary, truncate all input strings to a reasonable length before passing them to the copy and concatenation functions.

Mitigation MIT-11

Operation Build and Compilation

Strategy: Environment Hardening

Run or compile the software using features or extensions that randomly arrange the positions of a program's executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as "rebasing" (for Windows) and "prelinking" (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].

Mitigation MIT-12

Operation

Strategy: Environment Hardening

Use a CPU and operating system that offers Data Execution Protection (using hardware NX or XD bits) or the equivalent techniques that simulate this feature in software, such as PaX [REF-60] [REF-61]. These techniques ensure that any instruction executed is exclusively at a memory address that is part of the code segment.
For more information on these techniques see D3-PSEP (Process Segment Execution Prevention) from D3FEND [REF-1336].

Mitigation MIT-13

Implementation

Replace unbounded copy functions with analogous functions that support length arguments, such as strcpy with strncpy. Create these if they are not available.

No CAPEC attack patterns related to this CWE.

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