Common Weakness Enumeration
CWE-126
AllowedBuffer Over-read
Abstraction: Variant · Status: Draft
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.
968 vulnerabilities reference this CWE, most recent first.
CVE-2026-102758 (GCVE-0-2026-102758)
Vulnerability from cvelistv5 – Published: 2026-09-29 17:26 – Updated: 2026-09-30 20:42
VLAI
EPSS
VEX
Summary
The `_nx_secure_x509_asn1_tlv_block_parse()` function parses ASN.1 TLV (tag-length-value) blocks out of DER-encoded data. It is the primitive underneath all X.509 certificate parsing in NetX Secure, and therefore runs on certificates supplied by a remote peer during the TLS handshake.
The function reads the one-byte ASN.1 tag from the caller's buffer *before* checking that the buffer holds at least one byte. When a caller passes a remaining length of zero, the guard correctly returns `NX_SECURE_X509_ASN1_LENGTH_TOO_LONG`, but the read has already happened one byte past the end of the buffer.
code:
nx_secure/src/nx_secure_x509_asn1_tlv_block_parse.c
```
UINT _nx_secure_x509_asn1_tlv_block_parse(const UCHAR *buffer, ULONG *buffer_length, USHORT *tlv_type,
USHORT *tlv_tag_class, ULONG *tlv_length,
const UCHAR **tlv_data, ULONG *header_length)
{
UINT current_index;
USHORT current_tag;
ULONG length;
ULONG length_bytes;
current_index = 0;
current_tag = buffer[current_index]; /* <-- read before the bounds check */
if (*buffer_length < 1)
{
return(NX_SECURE_X509_ASN1_LENGTH_TOO_LONG);
}
```
The remainder of the function is correctly ordered. The multi-byte length path is guarded by `length_bytes > 4 || length_bytes > *buffer_length` before its read loop, the decoded value is checked against `length > *buffer_length`, and the second single-byte length read follows its own `*buffer_length < 1` guard. The tag read is the only load placed ahead of its check.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 20:42 UTC
CWE
- CWE-126 - Buffer Over-read
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | NetX Duo |
Affected:
0 , ≤ 6.5.1.202602
(custom)
Unaffected: 6.5.2.202603 |
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CVE-2026-102728 (GCVE-0-2026-102728)
Vulnerability from cvelistv5 – Published: 2026-09-29 17:55 – Updated: 2026-09-30 19:35
VLAI
EPSS
VEX
Summary
Two client-side TLS/DTLS handshake parsers in NetX Secure read fields from a server-supplied message before validating that the message is long enough to contain them. Both are bounded out-of-bounds reads on a remotely reachable path, both are reached from a TLS or DTLS client connecting to a malicious or malformed server, and both have the same shape: the bounds check exists and returns the correct status, but it runs after the read it is meant to guard.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:35 UTC
CWE
- CWE-126 - Buffer Over-read
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | NetX Duo |
Affected:
0 , ≤ 6.5.1.202602
(semver)
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CVE-2026-97399 (GCVE-0-2026-97399)
Vulnerability from cvelistv5 – Published: 2026-09-28 15:21 – Updated: 2026-09-28 17:07
VLAI
EPSS
VEX
Title
One-byte overread in strncasecmp on Power8
Summary
The strncasecmp function in the GNU C Library 2.24 and later optimized for the Power8 architecture may read one byte beyond the input size limit, which may crash a program when that byte is not readable.
This condition may happen when the input strings to the strncasecmp function are attacker controlled in an application and they match all the way up to the edge of their page and the neighbouring page is either not mapped or is not readable.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 15:33 UTC
CWE
- CWE-126 - Buffer over-read
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://sourceware.org/bugzilla/show_bug.cgi?id=34683 | issue-tracking |
| https://sourceware.org/git/?p=glibc.git;a=blob_pl… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/09/28/7 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The GNU C Library | glibc |
Affected:
2.24 , < 2.45
(custom)
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CVE-2026-96420 (GCVE-0-2026-96420)
Vulnerability from cvelistv5 – Published: 2026-09-29 09:30 – Updated: 2026-09-29 15:31
VLAI
EPSS
VEX
Title
Buffer Over-read in Wireshark
Summary
Toshiba file parser crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 15:31 UTC
CWE
- CWE-126 - Buffer Over-read
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wireshark Foundation | Wireshark |
Affected:
4.6.0 , < 4.6.9
(semver)
Affected: 4.4.0 , < 4.4.19 (semver) |
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CVE-2026-95392 (GCVE-0-2026-95392)
Vulnerability from cvelistv5 – Published: 2026-09-29 09:32 – Updated: 2026-09-29 15:46
VLAI
EPSS
VEX
Title
Buffer Over-read in Wireshark
Summary
MBIM protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
Severity
5.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 15:45 UTC
CWE
- CWE-126 - Buffer Over-read
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wireshark Foundation | Wireshark |
Affected:
4.6.0 , < 4.6.9
(semver)
Affected: 4.4.0 , < 4.4.19 (semver) |
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CVE-2026-94286 (GCVE-0-2026-94286)
Vulnerability from cvelistv5 – Published: 2026-09-28 08:50 – Updated: 2026-09-30 13:02
VLAI
EPSS
VEX
Title
Out-of-bounds read in libXtst's RECORD reply parser
Summary
An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 12:58 UTC
CWE
- CWE-126 - Buffer over-read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libxtst/-… | patch |
Impacted products
Date Public
2026-09-28 08:48
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CVE-2026-90610 (GCVE-0-2026-90610)
Vulnerability from cvelistv5 – Published: 2026-09-14 00:45 – Updated: 2026-09-15 13:58 X_Open Source
VLAI
EPSS
VEX
Title
GPAC MP4Box svg_attributes.c gf_svg_attributes_copy buffer over-read
Summary
A vulnerability was found in GPAC up to f1219cde. This affects the function gf_svg_attributes_copy of the file scenegraph/svg_attributes.c of the component MP4Box. Performing a manipulation results in buffer over-read. The attack is only possible with local access. The exploit has been made public and could be used. Upgrading to version abi-16.23 mitigates this issue. The patch is named afca1f1181668d85941d51ed1adf647807d5d975. Upgrading the affected component is recommended.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 13:42 UTC
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/403192 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/403192/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-90610 | third-party-advisory |
| https://vuldb.com/submit/913516 | third-party-advisory |
| https://github.com/gpac/gpac/issues/3819 | issue-tracking |
| https://github.com/r1ck9-2q/cve_summit/blob/main/… | exploit |
| https://github.com/gpac/gpac/commit/afca1f1181668… | patch |
| https://github.com/gpac/gpac/releases/tag/abi-16.23 | patch |
| https://github.com/gpac/gpac/ | product |
Impacted products
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CVE-2026-86243 (GCVE-0-2026-86243)
Vulnerability from cvelistv5 – Published: 2026-09-23 12:24 – Updated: 2026-09-23 18:10
VLAI
EPSS
VEX
Title
Apache Tomcat Native: DoS via TLS handshake
Summary
Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash.
This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected.
Users are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:28 UTC
CWE
- CWE-126 - Buffer over-read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/8p4jf02w54m22x0cw… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat Native |
Affected:
2.0.0 , ≤ 2.0.15
(semver)
Affected: 1.3.0 , ≤ 1.3.8 (semver) |
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CVE-2026-83951 (GCVE-0-2026-83951)
Vulnerability from cvelistv5 – Published: 2026-09-08 17:19 – Updated: 2026-10-01 23:00
VLAI
EPSS
VEX
Title
Microsoft Office Word Information Disclosure Vulnerability
Summary
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 18:54 UTC
CWE
- CWE-126 - Buffer Over-read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < 16.0.20326.20138
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < 16.0.10417.20207
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20906
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.20976
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5569.1000
(custom)
|
Date Public
2026-09-08 14:00
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CVE-2026-83949 (GCVE-0-2026-83949)
Vulnerability from cvelistv5 – Published: 2026-09-08 17:19 – Updated: 2026-10-01 23:00
VLAI
EPSS
VEX
Title
Microsoft Office Word Information Disclosure Vulnerability
Summary
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 19:41 UTC
CWE
- CWE-126 - Buffer Over-read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
5 products
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|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < 16.0.20326.20138
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < 16.0.10417.20207
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < 16.0.14334.20906
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < 16.0.17932.20976
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5569.1000
(custom)
|
Date Public
2026-09-08 14:00
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.