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.
CVE-2025-11934
LOWNVD 2.72.7—Elevated
EchelonGraph scoreMEDIUM confidence
Score 2.7 from GitHub Security Advisory (severity: LOW) published 2025-11-22. NVD baseline CVSS 2.7; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
2.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 2.7Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 2.7
- EG Score
- 2.7(medium)
- EG Risk
- 28(Track)EG Risk 28/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity27% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 5%
- KEV
- Not listed
Published
November 21, 2025
Last Modified
December 3, 2025
References (3)
- facts@wolfsslhttps://github.com/wolfSSL/wolfssl
- facts@wolfsslhttps://github.com/wolfSSL/wolfssl/pull/9113
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/wolfSSL/wolfssl/pull/9113
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Frequently asked(5)
What is CVE-2025-11934?
CVE-2025-11934 is a low vulnerability published on November 21, 2025. 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…
When was CVE-2025-11934 disclosed?
CVE-2025-11934 was first published in the National Vulnerability Database on November 21, 2025, with the most recent update on December 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-11934 actively exploited?
CVE-2025-11934 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 95.1% of all scored CVEs.
What is the CVSS score of CVE-2025-11934?
CVE-2025-11934 has a CVSS v3 base score of 2.7 (NVD).
How do I remediate CVE-2025-11934?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-11934, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2025-11934
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