Common Weakness Enumeration
CWE-193
AllowedOff-by-one Error
Abstraction: Base · Status: Draft
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
298 vulnerabilities reference this CWE, most recent first.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-03-28 02:20 UTC
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-2026-21870 (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 · CISA-ADP (v2.0.3)
Decision recorded 2026-02-13 18:19 UTC
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-2026-21504 (GCVE-0-2026-21504)
Vulnerability from cvelistv5 – Published: 2026-01-07 17:10 – Updated: 2026-01-07 18:18
VLAI
EPSS
VEX
Title
Heap Buffer Overflow in iccDEV ToneMap Parser
Summary
iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of ICC color management profiles. Prior to version 2.3.1.2, iccDEV is vulnerable to heap buffer overflow in the ToneMap parser. This issue has been patched in version 2.3.1.2.
Severity
6.6 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-07 18:18 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/InternationalColorConsortium/i… | x_refsource_CONFIRM |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| InternationalColorConsortium | iccDEV |
Affected:
< 2.3.1.2
|
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CVE-2026-21494 (GCVE-0-2026-21494)
Vulnerability from cvelistv5 – Published: 2026-01-06 19:00 – Updated: 2026-01-06 19:25
VLAI
EPSS
VEX
Title
iccDEV has heap buffer overflow in CIccTagLut8::Validate()
Summary
iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of International Color Consortium (ICC) color management profiles. A vulnerability present in versions prior to 2.3.1.2 affects users of the iccDEV library who process ICC color profiles. It results in heap buffer overflow in `CIccTagLut8::Validate()`. Version 2.3.1.2 contains a patch. No known workarounds are available.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-06 19:24 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/InternationalColorConsortium/i… | x_refsource_CONFIRM |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| InternationalColorConsortium | iccDEV |
Affected:
< 2.3.1.2
|
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CVE-2026-21491 (GCVE-0-2026-21491)
Vulnerability from cvelistv5 – Published: 2026-01-06 19:07 – Updated: 2026-01-06 19:36
VLAI
EPSS
VEX
Title
iccDEV has unicode buffer overflow in CIccTagTextDescription
Summary
iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of International Color Consortium (ICC) color management profiles. A vulnerability present in versions prior to 2.3.1.2 affects users of the iccDEV library who process ICC color profiles. It results in unicode buffer overflow in `CIccTagTextDescription`. Version 2.3.1.2 contains a patch. No known workarounds are available.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-06 19:22 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/InternationalColorConsortium/i… | x_refsource_CONFIRM |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| InternationalColorConsortium | iccDEV |
Affected:
< 2.3.1.2
|
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CVE-2026-21490 (GCVE-0-2026-21490)
Vulnerability from cvelistv5 – Published: 2026-01-06 19:04 – Updated: 2026-01-06 19:59
VLAI
EPSS
VEX
Title
iccDEV has heap buffer overflow in CIccTagLut16::Validate()
Summary
iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of International Color Consortium (ICC) color management profiles. A vulnerability present in versions prior to 2.3.1.2 affects users of the iccDEV library who process ICC color profiles. It results in heap buffer overflow in `CIccTagLut16::Validate()`. Version 2.3.1.2 contains a patch. No known workarounds are available.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-06 19:59 UTC
Assigner
References
4 references
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|---|---|
| https://github.com/InternationalColorConsortium/i… | x_refsource_CONFIRM |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
| https://github.com/InternationalColorConsortium/i… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| InternationalColorConsortium | iccDEV |
Affected:
< 2.3.1.2
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CVE-2026-18460 (GCVE-0-2026-18460)
Vulnerability from cvelistv5 – Published: 2026-09-22 17:50 – Updated: 2026-09-22 18:47
VLAI
EPSS
VEX
Title
Off-by-one Error, Out-of-bounds Write vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers.
Summary
Off-by-one Error, Out-of-bounds Write vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers. This issue affects Connext Professional: from 7.4.0 before 7.7.0.1, from 7.0.0 before 7.3.1.6.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:47 UTC
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RTI | Connext Professional |
Affected:
7.4.0 , < 7.7.0.1
(custom)
Affected: 7.0.0 , < 7.3.1.6 (custom) cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:* cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:* |
Date Public
2026-09-15 17:47
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CVE-2026-14368 (GCVE-0-2026-14368)
Vulnerability from cvelistv5 – Published: 2026-08-31 18:45 – Updated: 2026-09-01 14:02
VLAI
EPSS
VEX
Title
Off-by-one out-of-bounds NUL write in Zephyr LwM2M JSON string parser
Summary
The LwM2M JSON content formatter's get_string() in subsys/net/lib/lwm2m/lwm2m_rw_json.c copies a parsed JSON string into a caller-supplied buffer and NUL-terminates it. The length guard used if (string_length > buflen), which accepts a string whose length is exactly buflen. After memcpy() fills the whole buffer, buf[string_length] = '\0' then writes one byte past the end of the buffer (CWE-787).
The string value and its length are taken directly from the incoming CoAP payload during a LwM2M WRITE: do_write_op_json() parses the payload obtained from coap_packet_get_payload(), and get_string() is invoked from lwm2m_write_handler() (engine_get_string() in subsys/net/lib/lwm2m/lwm2m_message_handling.c) for a LWM2M_RES_TYPE_STRING resource. The destination buf/buflen is either the resource instance's fixed data buffer (res_inst->data_ptr/max_data_len) or the engine validation buffer (msg->ctx->validate_buf). A LwM2M server (the client's DTLS peer) can therefore write a string resource with a value whose length equals the target buffer size and force a one-byte overflow.
The overflow is a single out-of-bounds write of the constant byte 0x00 immediately past the resource or validation buffer, corrupting the adjacent byte in memory. It is not an information leak and the written value is fixed, so it is not a direct code-execution primitive, but it can corrupt adjacent state (an adjacent resource value, a length/flag field, or a struct field) and cause data corruption or a crash. Triggering the write is deterministic; the resulting impact depends on memory layout.
The fix changes the guard to string_length >= buflen, rejecting the exact-length case and aligning the JSON formatter with the other content formatters (lwm2m_rw_plain_text.c, lwm2m_rw_oma_tlv.c, lwm2m_rw_senml_json.c, lwm2m_rw_cbor.c, lwm2m_rw_senml_cbor.c), which already used the correct boundary check.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 14:02 UTC
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
3.2.0 , < 4.4.2
(semver)
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CVE-2026-12413 (GCVE-0-2026-12413)
Vulnerability from cvelistv5 – Published: 2026-07-02 21:19 – Updated: 2026-07-07 17:02
VLAI
EPSS
VEX
Title
IKEv2 Denial of Service via malformed fragmentation
Summary
An invalidly formatted IKEv2 fragment causes the Libreswan pluto daemon to crash and restart. Continued exploitation would cause a denial of service. The function reassemble_v2_incoming_fragments() would ignore unknown outer payloads but still store these in a fixed size array msg_digest.digest[PAYLIMIT]. An off-by-one error in the assertion PASSERT(logger, md->digest_roof < elemsof(md->digest)) causes the daemon to abort. No remote code execution is possible. Any configuration that allows IKEv2 connections that do not set fragmentation=no are vulnerable. IKEv1 is not affected.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 18:12 UTC
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Libreswan Project | libreswan |
Affected:
4.6 , ≤ 5.3
(semver)
Unaffected: 5.3.1 (semver) |
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CVE-2026-11771 (GCVE-0-2026-11771)
Vulnerability from cvelistv5 – Published: 2026-07-30 16:36 – Updated: 2026-07-30 18:04
VLAI
EPSS
VEX
Summary
OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-30 18:04 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://community.openvpn.net/Security%20Announce… | vendor-advisory |
| https://community.openvpn.net/ReleaseHistory#open… | release-notes |
| https://community.openvpn.net/ReleaseHistory#open… | release-notes |
Impacted products
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Mitigation
Implementation
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.