🛡️ CVE-2022-25640 — wolfssl

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-295 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

In wolfSSL before 5.2.0, a TLS 1.3 server cannot properly enforce a requirement for mutual authentication. A client can simply omit the certificate_verify message from the handshake, and never present a certificate.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity high, availability none.

Weakness class

CVE-2022-25640 is classified as CWE-295: Improper Certificate Validation. A TLS certificate is accepted without proper verification, so a man-in-the-middle can present their own.

Affected software

CVE-2022-25640 is recorded against 1 package.

  • wolfssl (fixed in 5.2.0)

Timeline and source

Published on 24 February 2022 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com

CVE-2022-25640 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE CWE-295
Public Exploit ✅ No
Source NVD
Published 2022-02-24
Updated 2026-08-11
Modified 2026-06-17

Affected Packages

Software From version Fixed in
wolfssl — 5.2.0

References

Patch, Third Party Advisory https://github.com/wolfSSL/wolfssl/pull/4831
Patch, Third Party Advisory https://github.com/wolfSSL/wolfssl/pull/4831

Similar Threats

Site Security Check

Is wolfssl part of your stack?

CVE-2022-25640 is rated CVSS 7.5 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.