CVE-2026-125400

high

Description

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.

References

https://www.vulncheck.com/advisories/ettercap-through-0.8.4.1-use-after-free-via-pcre2-filter-substitution

https://github.com/Ettercap/ettercap/security/advisories/GHSA-f3j5-rhhr-85j5

https://github.com/Ettercap/ettercap/pull/1330

https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98

https://github.com/Ettercap/ettercap/blob/v0.8.4.1/src/ec_filter.c#L593-L625

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-120563

Details

Source: Mitre, NVD

Published: 2026-11-10

Updated: 2026-11-10

Risk Information

CVSS v2

Base Score: 8.3

Vector: CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

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

Severity: High

CVSS v4

Base Score: 8.7

Vector: 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

Severity: High

EPSS

EPSS: 0.00247