CVE-2026-125400 ettercap ettercap: Use After Free

8.7 highEPSS 0.2%

High (8.7) in ettercap ettercap. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.

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Severity
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Affected
Versions
Linux distributions
References
Your exposure

Ettercap through 0.8.4.1 contains a use-after-free vulnerability in func_pcre() in src/ec_filter.c that reads the PCRE2 ovector after freeing match data. Network-adjacent attackers can send packets matching a loaded pcre_regex() substitution filter to corrupt memory and potentially execute code as root.

Severity

CVSS 4.0

8.7 high

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

8.8 high

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

EPSS: 0.2% estimated probability of exploitation activity in the next 30 days; 16th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC): Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE: CWE-416 Use After Free
Published: 2026-11-10 00:17 UTC
Modified: 2026-11-12 21:07 UTC
Assigned by: VulnCheck (CNA)
NVD analysis: Awaiting analysis
Record from: the NVD, synced 2026-11-12 21:27 UTC

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Affected

ettercap:ettercap

Versions

From the CNA's record in the CVE List.

Product	Affected
ettercap	through 0.8.4.1

Linux distributions

Distribution	Release	Package	Fixed in	Advisory
Debian	12, 13	ettercap	no fix listed	DEBIAN-CVE-2026-125400
Ubuntu	16.04:LTS, 18.04:LTS, 20.04:LTS and 4 more	ettercap	no fix listed	UBUNTU-CVE-2026-125400

From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu.

References

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