What’s Vulnerable › Vulnerabilities

CVE-2024-39844

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-03 · updated 2026-06-17
• Weakness: CWE-94

Description

In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.

Affected products

• znc: before 1.9.1 — fixed in 1.9.1

How to fix

Upgrade to a fixed version: znc 1.9.1. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2024/07/03/9
• https://github.com/znc/znc/releases/tag/znc-1.9.1
• https://wiki.znc.in/Category:ChangeLog
• https://wiki.znc.in/ChangeLog/1.9.1
• https://www.openwall.com/lists/oss-security/2024/07/03/9
• http://www.openwall.com/lists/oss-security/2024/07/03/9
• https://github.com/znc/znc/releases/tag/znc-1.9.1
• https://wiki.znc.in/Category:ChangeLog
• https://wiki.znc.in/ChangeLog/1.9.1
• https://www.openwall.com/lists/oss-security/2024/07/03/9

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