Ettercap through 0.8.4.1 Stack Buffer Overflow via WPA CCMP Decryption
- Exploited
- No known exploitation
- Fix
- Fix or patch referenced
- Who is exposed
- Not reported
Do first: Apply the patch listed under Evidence.
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 8/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Ettercap through 0.8.4.1 contains an integer underflow in ccmp_decrypt() in src/ec_encryption_ccmp.c that subtracts the 8-byte CCMP trailer without checking minimum length. Attackers on a network whose WPA key is loaded can send a short crafted CCMP frame to overflow a stack buffer in the Ettercap process, which normally runs as root.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure?/25Unknown. Advisories don't say whether default setups are affected
- Reach?/20Unknown. No tracked technology or package matched
- Severity7.7/10CVSS 7.7
- No patch0/5No signal
What would change the score
- Would score about 63 if added to CISA KEV
- Would score about 58 if CISA's SSVC rates exploitation active
- Would score about 30 if advisories confirm default setups are exposed
What to do
Apply the patch listed under Evidence.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- Ettercap ettercap
through 0.8.4.1
Evidence 5
- Advisory
- Patch
- Patch
- Repository
- Link
Corrections
None so far.
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Questions about CVE-2026-125404
Is CVE-2026-125404 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
Ettercap has a stack buffer overflow in its WPA2/CCMP decryption code. A malformed short CCMP frame can make the Ettercap process write past a stack buffer, which corrupts the stack of a process that normally runs as root.Source: vulncheck.com, github.com
Which versions are affected by CVE-2026-125404?
ettercap: through 0.8.4.1.Source: cve.now feed data
Am I affected, and how do I check?
Ettercap 0.8.4.1 and earlier are listed as affected. The bug only applies when Ettercap is sniffing 802.11 in monitor mode with a valid WPA2/CCMP security association installed; to check, look at the installed Ettercap version (for example with ettercap --version) and whether monitor-mode 802.11 sniffing with WPA2 keys is set up.Source: vulncheck.com, github.com
How do I fix CVE-2026-125404?
No fixed version is named in the available facts, so the upgrade target is not confirmed. Check the Ettercap project for a release newer than 0.8.4.1 that includes a fix.Source: vulncheck.com, github.com