CVE-2025-11934

LOW EPSS 4.6%
Published Nov 21, 20257mo ago · Modified Jun 17, 20261w ago
2.1 CVSS 4.0
Low
Find Similar
Published Nov 21, 2025 7mo ago
Last Modified Jun 17, 2026 1w ago

Description

Improper input validation in the TLS 1.3 CertificateVerify signature algorithm negotiation in wolfSSL 5.8.2 and earlier on multiple platforms allows for downgrading the signature algorithm used. For example when a client sends ECDSA P521 as the supported signature algorithm the server previously could respond as ECDSA P256 being the accepted signature algorithm and the connection would continue with using ECDSA P256, if the client supports ECDSA P256.

CVSS Details

Base Score
2.1
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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 High
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
4.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-20 Improper Input Validation Validation

Affected Products 3

VendorProductVersionRange
wolfsslwolfssl*≥5.8.2  –  <5.8.4
applemacos*any
linuxlinux_kernel*any

References 2

  • github.com https://github.com/wolfSSL/wolfssl
    Product
  • github.com https://github.com/wolfSSL/wolfssl/pull/9113
    Issue TrackingPatch

Remediation

  • github.com https://github.com/wolfSSL/wolfssl/pull/9113
    Issue TrackingPatch