EUVD-2026-21183
GHSA-mx4j-fjqx-f8qj
6.3
CVSS 4.0
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CVSS Vector
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
3
Analysis Generated
Apr 09, 2026 - 21:00 vuln.today
EUVD ID Assigned
Apr 09, 2026 - 21:00 euvd
EUVD-2026-21183
CVE Published
Apr 09, 2026 - 20:13 nvd
MEDIUM 6.3
Description
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.
Analysis
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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Priority Score
32
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0
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External POC / Exploit Code
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