CVE-2024-39844

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

3.86% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 89.7% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2024-07-03 00:00Z2 YR AGO

Last updated

2024-08-02 04:26Z2 YR AGO

Reserved

2024-06-29

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-94Improper Control of Generation of Code ('Code Injection')Base

Data version

5.1

Document digest

924e869164ee7893042c7af95299e39bf9cd9a78611764564ef48d1fd42f9192

• wiki.znc.inhttps://wiki.znc.in/Category:ChangeLog
• github.comhttps://github.com/znc/znc/releases/tag/znc-1.9.1
• wiki.znc.inhttps://wiki.znc.in/ChangeLog/1.9.1
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2024/07/03/9
• www.openwall.com[oss-security] 20240703 CVE-2024-39844: ZNC modtcl RCEhttp://www.openwall.com/lists/oss-security/2024/07/03/9mailing-list