CVE-2026-125401 json
Ettercap through 0.8.4.1 Heap Buffer Overflow via Gadu-Gadu Dissector
published 6d ago modified yesterday also EUVD-2026-120564 , GHSA-vrjv-f8gv-2h35
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository Ettercap/ettercap. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
Ettercap through 0.8.4.1 contains a heap buffer overflow vulnerability in gg_get_version() in src/dissectors/ec_gg.c that writes up to 44 bytes into a 30-byte allocation. Remote attackers can send Gadu-Gadu traffic on TCP port 8074 with a crafted version field through a monitored network to corrupt heap memory in the Ettercap process, which normally runs as root.
Patch / fix
- github.com/Ettercap/ettercap@1d8badb commit
- github.com/Ettercap/ettercap#1330 pull request
Is CVE-2026-125401 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.2 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| CNA | 4.0 | 7.2 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
Affected products
- Ettercap ettercap
Classification
- Weakness
-
- CWE-122 Heap-based Buffer Overflow
References
-
github.com
/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98
patch
-
github.com
/Ettercap/ettercap/pull/1330
issue-tracking, patch
-
github.com
/Ettercap/ettercap/security/advisories/GHSA-vrjv-f8gv-2h35
vendor-advisory, advisory
-
github.com
/Ettercap/ettercap/blob/v0.8.4.1/src/dissectors/ec_gg.c#L599
technical-description
-
vulncheck.com
/advisories/ettercap-through-0.8.4.1-heap-buffer-overflow-via-gadu-gadu-dissector
third-party-advisory
Sources
- CVE List CVE-2026-125401
- NVD CVE-2026-125401
- Maintainer advisory GHSA-vrjv-f8gv-2h35
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of Ettercap/ettercap published their own advisory on GitHub. Reviewed sources take precedence over it.