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CVE-2025-62291

8.1 · HIGH
Published Jan 16, 2026 CWE-191

Overview

CVE-2025-62291 is a high-severity vulnerability. It was published on January 16, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical Description

In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHub github.com/strongswan/strongswan/commits/master/src/libcharon/plugins/eap_mschapv2 GitHub github.com/strongswan/strongswan/releases Ref www.strongswan.org/blog/2025/10/27/strongswan-vulnerability-%28cve-2025-62291%29.html Ref lists.debian.org/debian-lts-announce/2025/11/msg00002.html

Frequently Asked Questions

What is CVE-2025-62291?

CVE-2025-62291 is a high-severity vulnerability. It was published on January 16, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2025-62291?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-62291?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-62291?

CyberStrike's AI-powered security agents can automatically detect CVE-2025-62291 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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