CVE-2026-3548

HIGH EPSS 37.2%
Published Mar 19, 20263mo ago · Modified Jun 17, 20261w ago
7.2 CVSS 4.0
High
Find Similar
Published Mar 19, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

Two buffer overflow vulnerabilities existed in the wolfSSL CRL parser when parsing CRL numbers: a heap-based buffer overflow could occur when improperly storing the CRL number as a hexadecimal string, and a stack-based overflow for sufficiently sized CRL numbers. With appropriately crafted CRLs, either of these out of bound writes could be triggered. Note this only affects builds that specifically enable CRL support, and the user would need to load a CRL from an untrusted source.

CVSS Details

Base Score
7.2
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/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

Threat Intelligence

EPSS Exploit Probability
37.2% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-122
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 1

VendorProductVersionRange
wolfsslwolfssl* <5.9.0

References 2

  • github.com https://github.com/wolfSSL/wolfssl/pull/9628/
    Issue TrackingPatch
  • github.com https://github.com/wolfSSL/wolfssl/pull/9873/
    ExploitIssue TrackingPatch

Remediation

  • github.com https://github.com/wolfSSL/wolfssl/pull/9628/
    Issue TrackingPatch
  • github.com https://github.com/wolfSSL/wolfssl/pull/9873/
    ExploitIssue TrackingPatch