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CWE-193
Off-by-one Error
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
CVE-2026-21870 (GCVE-0-2026-21870)
Vulnerability from cvelistv5 – Published: 2026-02-13 17:58 – Updated: 2026-02-13 18:19
VLAI
EPSS
VEX
Title
The BACnet Protocol Stack library has an Off-by-one Stack-based Buffer Overflow in tokenizer_string
Summary
BACnet Protocol Stack library provides a BACnet application layer, network layer and media access (MAC) layer communications services. In 1.4.2, 1.5.0.rc2, and earlier, an off-by-one stack-based buffer overflow in the ubasic interpreter causes a crash (SIGABRT) when processing string literals longer than the buffer limit. The tokenizer_string function in src/bacnet/basic/program/ubasic/tokenizer.c incorrectly handles null termination for maximum-length strings. It writes a null byte to dest[40] when the buffer size is only 40 (indices 0-39), triggering a stack overflow.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-193 - Off-by-one Error
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/bacnet-stack/bacnet-stack/secu… | x_refsource_CONFIRM |
| https://github.com/bacnet-stack/bacnet-stack/pull/1196 | x_refsource_MISC |
| https://github.com/bacnet-stack/bacnet-stack/comm… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| bacnet-stack | bacnet-stack |
Affected:
<= 1.4.2
Affected: >= 1.5.0.rc1, <= 1.5.0.rc2 |
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CVE-2026-22593 (GCVE-0-2026-22593)
Vulnerability from cvelistv5 – Published: 2026-03-26 13:49 – Updated: 2026-03-28 02:20
VLAI
EPSS
VEX
Title
EVerest has off-by-one stack buffer overflow in IsoMux certificate filename parsing
Summary
EVerest is an EV charging software stack. Prior to version 2026.02.0, an off-by-one check in IsoMux certificate filename handling causes a stack-based buffer overflow when a filename length equals `MAX_FILE_NAME_LENGTH` (100). A crafted filename in the certificate directory can overflow `file_names[idx]`, corrupting stack state and enabling potential code execution. Version 2026.02.0 contains a patch.
Severity
8.4 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-193 - Off-by-one Error
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/EVerest/EVerest/security/advis… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EVerest | everest-core |
Affected:
< 2026.02.0
|
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CVE-2026-26309 (GCVE-0-2026-26309)
Vulnerability from cvelistv5 – Published: 2026-03-10 19:04 – Updated: 2026-03-10 20:12
VLAI
EPSS
VEX
Title
Envoy has an off-by-one write in JsonEscaper::escapeString()
Summary
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, an off-by-one write in Envoy::JsonEscaper::escapeString() can corrupt std::string null-termination, causing undefined behavior and potentially leading to crashes or out-of-bounds reads when the resulting string is later treated as a C-string. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-193 - Off-by-one Error
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.37.0, < 1.37.1
Affected: >= 1.36.0, < 1.36.5 Affected: >= 1.35.0, < 1.35.9 Affected: < 1.34.13 |
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CVE-2026-2703 (GCVE-0-2026-2703)
Vulnerability from cvelistv5 – Published: 2026-02-19 04:02 – Updated: 2026-02-24 01:40 X_Open Source
VLAI
EPSS
VEX
Title
xlnt-community xlnt Encrypted XLSX File base64.cpp decode_base64 off-by-one
Summary
A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::decode_base64 of the file source/detail/cryptography/base64.cpp of the component Encrypted XLSX File Parser. Executing a manipulation can lead to off-by-one. The attack requires local access. The exploit has been made available to the public and could be used for attacks. This patch is called f2d7bf494e5c52706843cf7eb9892821bffb0734. Applying a patch is advised to resolve this issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.346649 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.346649 | signaturepermissions-required |
| https://vuldb.com/?submit.754377 | third-party-advisory |
| https://github.com/xlnt-community/xlnt/issues/137 | issue-tracking |
| https://github.com/oneafter/0128/blob/main/xl1/repro | exploit |
| https://github.com/xlnt-community/xlnt/commit/f2d… | patch |
| https://github.com/xlnt-community/xlnt/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| xlnt-community | xlnt |
Affected:
1.6.0
Affected: 1.6.1 |
Credits
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CVE-2026-28520 (GCVE-0-2026-28520)
Vulnerability from cvelistv5 – Published: 2026-03-15 13:35 – Updated: 2026-03-16 14:20
VLAI
EPSS
VEX
Title
arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code Execution
Summary
arduino-TuyaOpen before version 1.2.1 contains a single-byte buffer overflow vulnerability in the WiFiMulti component. When the victim's smart hardware connects to an attacker-controlled AP hotspot, the attacker can exploit the overflow to execute arbitrary code on the affected embedded device.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-193 - Off-by-one Error
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://src.tuya.com/announcement/32 | vendor-advisory |
| https://github.com/tuya/arduino-TuyaOpen | product |
| https://www.vulncheck.com/advisories/arduino-tuya… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Tuya | arduino-TuyaOpen |
Affected:
0 , < 1.2.1
(semver)
|
Date Public
2026-03-11 00:00
Credits
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CVE-2026-31988 (GCVE-0-2026-31988)
Vulnerability from cvelistv5 – Published: 2026-03-11 22:58 – Updated: 2026-03-12 13:40
VLAI
EPSS
VEX
Title
yauzl 3.2.0 - Denial of Service via Off-by-One Error in NTFS Timestamp Parser
Summary
yauzl (aka Yet Another Unzip Library) version 3.2.0 for Node.js contains an off-by-one error in the NTFS extended timestamp extra field parser within the getLastModDate() function. The while loop condition checks cursor < data.length + 4 instead of cursor + 4 <= data.length, allowing readUInt16LE() to read past the buffer boundary. A remote attacker can cause a denial of service (process crash via ERR_OUT_OF_RANGE exception) by sending a crafted zip file with a malformed NTFS extra field. This affects any Node.js application that processes zip file uploads and calls entry.getLastModDate() on parsed entries. Fixed in version 3.2.1.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-193 - Off-by-one Error
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/thejoshwolfe/yauzl/commit/c469… | patch |
| https://www.codeant.ai/security-research/yauzl-de… | third-party-advisory |
| https://www.npmjs.com/package/yauzl | product |
| https://www.vulncheck.com/advisories/yauzl-denial… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| thejoshwolfe | yauzl |
Affected:
3.2.0 , < 3.2.1
(semver)
Unaffected: 3.2.1 |
Date Public
2026-02-28 00:00
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CVE-2026-32605 (GCVE-0-2026-32605)
Vulnerability from cvelistv5 – Published: 2026-04-13 18:54 – Updated: 2026-04-16 13:26
VLAI
EPSS
VEX
Title
Nimiq: Remote crash via off-by-one signer bounds check in proposal buffer
Summary
nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. Prior to version 1.3.0, an untrusted peer could crash a validator by publishing a signed tendermint proposal message where signer == validators.num_validators(). ProposalSender::send uses > instead of >= for the signer bounds check, so the equality case passes and reaches validators.get_validator_by_slot_band(signer), which panics with an out-of-bounds index before any signature verification runs. This issue has been fixed in version 1.3.0.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/nimiq/core-rs-albatross/securi… | x_refsource_CONFIRM |
| https://github.com/nimiq/core-rs-albatross/pull/3661 | x_refsource_MISC |
| https://github.com/nimiq/core-rs-albatross/commit… | x_refsource_MISC |
| https://github.com/nimiq/core-rs-albatross/releas… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| nimiq | core-rs-albatross |
Affected:
< 1.3.0
|
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CVE-2026-33997 (GCVE-0-2026-33997)
Vulnerability from cvelistv5 – Published: 2026-03-31 01:36 – Updated: 2026-06-30 12:09
VLAI
EPSS
VEX
Title
Moby: Off-by-one error in plugin privilege validation
Summary
Moby is an open source container framework. Prior to version 29.3.1, a security vulnerability has been detected that allows plugins privilege validation to be bypassed during docker plugin install. Due to an error in the daemon's privilege comparison logic, the daemon may incorrectly accept a privilege set that differs from the one approved by the user. Plugins that request exactly one privilege are also affected, because no comparison is performed at all. This issue has been patched in version 29.3.1.
Severity
6.8 (Medium)
8.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/moby/moby/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/moby/moby/releases/tag/docker-… | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2026-33997 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2453277 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:22347 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:21769 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:23345 | vendor-advisoryx_refsource_REDHAT |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| moby | moby |
Affected:
< 29.3.1
|
|
| Red Hat | Multicluster Global Hub 1.4.5 |
cpe:/a:redhat:multicluster_globalhub:1.4::el9 |
|
| Red Hat | Multicluster Global Hub 1.5.4 |
cpe:/a:redhat:multicluster_globalhub:1.5::el9 |
|
| Red Hat | Multicluster Global Hub 1.6.2 |
cpe:/a:redhat:multicluster_globalhub:1.6::el9 |
|
| Red Hat | Multicluster Engine for Kubernetes |
cpe:/a:redhat:multicluster_engine |
|
| Red Hat | OpenShift Service Mesh 2 |
cpe:/a:redhat:service_mesh:2 |
|
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 |
cpe:/a:redhat:acm:2 |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
|
| Red Hat | Red Hat OpenShift Virtualization 4 |
cpe:/a:redhat:container_native_virtualization:4 |
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CVE-2026-34085 (GCVE-0-2026-34085)
Vulnerability from cvelistv5 – Published: 2026-03-25 16:54 – Updated: 2026-04-02 17:50
VLAI
EPSS
VEX
Summary
fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-193 - Off-by-one Error
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| fontconfig project | fontconfig |
Affected:
0 , < 2.17.1
(semver)
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CVE-2026-40254 (GCVE-0-2026-40254)
Vulnerability from cvelistv5 – Published: 2026-04-24 02:24 – Updated: 2026-04-24 12:06
VLAI
EPSS
VEX
Title
FreeRDP: contains_dotdot() off-by-one allows drive channel path traversal via terminal ..
Summary
FreeRDP is a free implementation of the Remote Desktop Protocol. Versions prior to 3.25.0 have an off-by-one in the path traversal filter in `channels/drive/client/drive_file.c`. The `contains_dotdot()` function catches `../` and `..\` mid-path but misses `..` when it's the last component with no trailing separator. A rogue RDP server can read, list, or write files one directory above the client's shared folder through RDPDR requests. This requires the victim to connect with drive redirection enabled. Version 3.25.0 patches the issue.
Severity
4.2 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-193 - Off-by-one Error
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | x_refsource_CONFIRM |
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Mitigation
Phase: Implementation
Description:
- When copying character arrays or using character manipulation methods, the correct size parameter must be used to account for the null terminator that needs to be added at the end of the array. Some examples of functions susceptible to this weakness in C include strcpy(), strncpy(), strcat(), strncat(), printf(), sprintf(), scanf() and sscanf().
No CAPEC attack patterns related to this CWE.