Common Weakness Enumeration
CWE-787
Allowed-with-ReviewOut-of-bounds Write
Abstraction: Base · Status: Draft
The product writes data past the end, or before the beginning, of the intended buffer.
15331 vulnerabilities reference this CWE, most recent first.
CVE-2026-73072 (GCVE-0-2026-73072)
Vulnerability from cvelistv5 – Published: 2026-08-11 15:31 – Updated: 2026-08-11 15:31
VLAI
EPSS
VEX
Title
Vim: Heap Buffer Overflow when Loading a Spell File
Summary
Vim is an open source, command line text editor. Prior to 9.2.0846, set_sofo() in src/spellfile.c reuses sl_sal_first[] without resetting values left by set_sal_first(), so a crafted spell file containing an SN_SAL section before an SN_SOFO section causes under-counted mapping lists and attacker-influenced writes beyond a heap allocation. This issue is fixed in version 9.2.0846.
Severity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/vim/vim/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/vim/vim/commit/05c41c922309c7a… | x_refsource_MISC |
| https://github.com/vim/vim/releases/tag/v9.2.0846 | x_refsource_MISC |
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CVE-2026-73066 (GCVE-0-2026-73066)
Vulnerability from cvelistv5 – Published: 2026-08-11 14:49 – Updated: 2026-08-11 15:36
VLAI
EPSS
VEX
Title
Tesseract: Heap out-of-bounds write in LSTM Convolve layer via crafted .traineddata
Summary
Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata LSTM model component loaded through Tesseract's deserializer can cause an unchecked signed integer multiplication in Convolve::DeSerialize in src/lstm/convolve.cpp to wrap the convolution output-channel count, undersizing the forward-pass output buffer while writes use the unwrapped element count and causing a heap out-of-bounds write during OCR recognition. This issue is fixed in version 5.5.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 15:31 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tesseract-ocr/tesseract/securi… | x_refsource_CONFIRM |
| https://github.com/tesseract-ocr/tesseract/pull/4588 | x_refsource_MISC |
| https://github.com/tesseract-ocr/tesseract/commit… | x_refsource_MISC |
| https://github.com/tesseract-ocr/tesseract/releas… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tesseract-ocr | tesseract |
Affected:
< 5.5.3
|
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CVE-2026-71969 (GCVE-0-2026-71969)
Vulnerability from cvelistv5 – Published: 2026-08-10 18:18 – Updated: 2026-08-10 19:47 X_Open Source
VLAI
EPSS
VEX
Title
OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations
Summary
OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an input length exceeding the RSA modulus size. When src_len exceeds rsa_len, the subtraction expression wraps to a large unsigned value, causing a subsequent memcpy to write attacker-controlled data before the destination buffer in S-EL1 secure-world heap memory.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 19:47 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/OP-TEE/optee_os/pull/7898 | issue-tracking |
| https://github.com/OP-TEE/optee_os/pull/7808 | issue-tracking |
| https://github.com/OP-TEE/optee_os/commit/7b8b494… | patch |
| https://www.vulncheck.com/advisories/op-tee-os-bu… | third-party-advisory |
Impacted products
Date Public
2026-07-30 00:00
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CVE-2026-71263 (GCVE-0-2026-71263)
Vulnerability from cvelistv5 – Published: 2026-08-05 12:26 – Updated: 2026-08-10 11:46
VLAI
EPSS
VEX
Title
FreeModbus LINUXTCP Port Off-by-One Global Buffer Overflow in xMBPortTCPPool()
Summary
The LINUXTCP port of FreeModbus contains an off-by-one bounds check in xMBPortTCPPool (demo/LINUXTCP/port/porttcp.c). The check uses a strict greater-than comparison instead of greater-than-or-equal against the 263-byte MB_TCP_BUF_SIZE limit.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 15:39 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cwalter-at/freemodbus | third-party-advisory |
| https://github.com/cwalter-at/freemodbus/blob/mas… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| cwalter-at | FreeModbus |
Affected:
0 , ≤ *
(custom)
|
Date Public
2026-08-05 12:26
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CVE-2026-71255 (GCVE-0-2026-71255)
Vulnerability from cvelistv5 – Published: 2026-08-05 11:44 – Updated: 2026-08-10 11:46
VLAI
EPSS
VEX
Title
nanoMODBUS Client-Side Out-of-Bounds Write via object_length in recv_read_device_identification_res()
Summary
nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus client-side recv_read_device_identification_res function (FC 0x2B/MEI 0x0E, Read Device Identification) in nanomodbus.c. The server-supplied object_length field (0-246) is validated only against the remaining PDU size (res_size_left) and is never validated against the caller-supplied buffers_length parameter.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 12:28 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/debevv/nanoMODBUS | third-party-advisory |
| https://github.com/debevv/nanoMODBUS/blob/master/… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| debevv | nanoMODBUS |
Affected:
0 , ≤ 1.23.0
(semver)
|
Date Public
2026-08-05 11:44
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CVE-2026-71254 (GCVE-0-2026-71254)
Vulnerability from cvelistv5 – Published: 2026-08-05 11:44 – Updated: 2026-08-10 11:46
VLAI
EPSS
VEX
Title
nanoMODBUS Server-Side Out-of-Bounds Write in handle_read_file_record()
Summary
nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus server-side handle_read_file_record function (FC 0x14, Read File Record) in nanomodbus.c. The function validates that the total request size does not exceed 245 bytes and that each sub-request's record_length is at most 124, but it never validates the CUMULATIVE response size across all sub-requests before processing them.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 12:29 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/debevv/nanoMODBUS | third-party-advisory |
| https://github.com/debevv/nanoMODBUS/blob/master/… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| debevv | nanoMODBUS |
Affected:
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(semver)
|
Date Public
2026-08-05 11:44
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CVE-2026-70632 (GCVE-0-2026-70632)
Vulnerability from cvelistv5 – Published: 2026-08-06 21:26 – Updated: 2026-08-07 17:20 X_Open Source
VLAI
EPSS
VEX
Title
FFmpeg 4.4 < 9.0 Heap Out-of-Bounds Write in CFHD Decoder via AVI Demuxing
Summary
FFmpeg versions from 4.4 up to, but not including, 9.0 contain an out-of-bounds heap write vulnerability in the native GoPro CineForm HD (CFHD) decoder that allows remote attackers to corrupt heap memory by supplying a crafted AVI file during stream probing. The cfhd_decode() function fails to enforce the non-Bayer logical output-width invariant in the transform-type-2 reconstruction path, causing horiz_filter_clip() to write oversized 16-bit sample rows far beyond the allocated output frame buffer, which can be escalated to arbitrary code execution via overwrite of a live cleanup callback pointer.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 17:19 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23898 | issue-tracking |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1006… | related |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/db05… | patch |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/16b2… | patch |
| https://www.vulncheck.com/advisories/ffmpeg-heap-… | third-party-advisory |
Date Public
2026-07-24 00:00
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CVE-2026-70628 (GCVE-0-2026-70628)
Vulnerability from cvelistv5 – Published: 2026-08-06 21:24 – Updated: 2026-08-07 17:10 X_Open Source
VLAI
EPSS
VEX
Title
FFmpeg 0.5 < 9.0 DVB Subtitle Parser Heap Buffer Overflow via WTV File
Summary
FFmpeg versions from 0.5 up to, but not including, 9.0 contain a signed integer overflow vulnerability in the DVB subtitle parser in libavcodec/dvbsub_parser.c that allows attackers to trigger a heap buffer overflow by supplying a crafted WTV file. The overflow causes the bounds-check guard expression to wrap to INT_MIN, bypassing the PARSE_BUF_SIZE comparison and invoking memcpy() with attacker-controlled data into a heap buffer, resulting in an out-of-bounds heap write and potential memory corruption or code execution.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 14:57 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23897 | issue-tracking |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/c6ec… | related |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/93f2… | patch |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/02fc… | patch |
| https://www.vulncheck.com/advisories/ffmpeg-dvb-s… | third-party-advisory |
Date Public
2026-07-24 00:00
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CVE-2026-70354 (GCVE-0-2026-70354)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:07 – Updated: 2026-08-12 17:57
VLAI
EPSS
VEX
Title
.NET Core Remote Code Execution Vulnerability
Summary
Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 16:10 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
13 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | .NET 10.0 |
Affected:
10.0.0 , < 10.0.11
(custom)
|
|
| Microsoft | .NET 8.0 |
Affected:
8.0.0 , < 8.0.30
(custom)
|
|
| Microsoft | .NET 9.0 |
Affected:
9.0.0 , < 9.0.19
(custom)
|
|
| Microsoft | Microsoft .NET Framework 3.5 |
Affected:
3.5.0 , < 2.0.50727.8984 & 3.0.30729.8980
(custom)
|
|
| Microsoft | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 |
Affected:
3.0.0.0 , < 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0
(custom)
|
|
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 |
Affected:
4.7.0 , < 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0
(custom)
|
|
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 |
Affected:
4.8.0 , < 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0
(custom)
|
|
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 |
Affected:
4.8.1 , < 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0
(custom)
|
|
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 |
Affected:
4.7.0 , < 4.7.4144.0
(custom)
|
|
| Microsoft | Microsoft .NET Framework 4.8 |
Affected:
4.8.0 , < 4.8.4805.0
(custom)
|
|
| Microsoft | Microsoft .NET Framework 4.8.1 |
Affected:
4.8.0.0 , < 4.8.9344.0
(custom)
|
|
| Microsoft | Microsoft Visual Studio 2022 version 17.14 |
Affected:
17.14.0 , < 17.14.38
(custom)
|
|
| Microsoft | Microsoft Visual Studio 2026 version 18.8 |
Affected:
18.0 , < 18.8.3
(custom)
|
Date Public
2026-08-11 14:00
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CVE-2026-68806 (GCVE-0-2026-68806)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:05 – Updated: 2026-08-12 17:55
VLAI
EPSS
VEX
Title
Microsoft Excel Remote Code Execution Vulnerability
Summary
Out-of-bounds write in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 03:57 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5565.1001
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.112.26081010
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.112.26081010
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.112.26081010
(custom)
|
Date Public
2026-08-11 14:00
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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.