EUVD-2026-21183
Heap-based Buffer Overflow (CWE-122)
GHSA-mx4j-fjqx-f8qj
6.3
CVSS 4.0
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CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X
Lifecycle Timeline
4
Patch available
Apr 16, 2026 - 05:29 EUVD
5.9.1
EUVD ID Assigned
Apr 09, 2026 - 21:00 euvd
EUVD-2026-21183
Analysis Generated
Apr 09, 2026 - 21:00 vuln.today
CVE Published
Apr 09, 2026 - 20:13 nvd
MEDIUM 6.3
DescriptionNVD
Heap buffer overflow in CertFromX509 via AuthorityKeyIdentifier size confusion. A heap buffer overflow occurs when converting an X.509 certificate internally due to incorrect size handling of the AuthorityKeyIdentifier extension.
AnalysisAI
Heap buffer overflow in wolfSSL's CertFromX509 function allows remote attackers to cause information disclosure through malformed X.509 certificates containing oversized AuthorityKeyIdentifier extensions. The vulnerability requires a persistent attacker (AT:P per CVSS 4.0) but no authentication, affecting wolfSSL across all versions until patched. …
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Vendor StatusVendor
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External POC / Exploit Code
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Destination URL
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