CVE-2002-0276: Buffer overflow in various decoders in Ettercap 0.6.3.1 and earlier, when running on networks with an MTU grea

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HIGH 7.5DOWNGRADE

CVE-2002-0276 is a high-severity flaw (CVSS 7.5) affecting ettercap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in various decoders in Ettercap 0.6.3.1 and earlier, when running on networks with an MTU greater than 2000, allows remote attackers to execute arbitrary code via large packets.

Why this priority

High severity
EPSS top 8%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	5.0% (top 8%)
CISA exploited list	No
Published	2002-05-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ettercap

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2002-05-31 04:00 UTCPublished CVE record published
2026-06-16 21:57 UTCUpdated Record last modified

ettercap ettercap DOWNGRADE

Affected: 0.6.3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.6.3.1

1. Check installed version

apt-cache policy ettercap || rpm -q ettercap || ettercap --version

2. No fixed release: DOWNGRADE to a release before 0.6.3.1 (Debian / Ubuntu)

apt-cache madison ettercap sudo apt install ettercap=<VERSION_BEFORE_0.6.3.1> sudo apt-mark hold ettercap

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ettercap sudo dnf downgrade ettercap-<VERSION_BEFORE_0.6.3.1> sudo dnf versionlock add ettercap

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Ettercap 0.6.3.1 - Large Packet Buffer Overflow

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2002-0276?

ettercap: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-0276 being exploited?

CVE-2002-0276 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2002-0276 affect?

CVE-2002-0276 affects ettercap. Severity is high (CVSS 7.5). Buffer overflow in various decoders in Ettercap 0.6.3.1 and earlier, when running on networks with an MTU greater than 2000, allows remote attackers to execute arbitrary code via large packets.

How urgent is CVE-2002-0276?

Priority 54/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2026-3606 LOW 3.3 DOWNGRADE A vulnerability has been found in Ettercap 0.8.4-Garofalo
CVE-2017-8366 CRITICAL 9.8 DOWNGRADE The strescape function in ec_strings.c in Ettercap 0.8.2 allows remote attackers to cause a denial of service
CVE-2017-6430 MEDIUM 5.5 UPGRADE The compile_tree function in ef_compiler.c in the Etterfilter utility in Ettercap 0.8.2 and earlier allows rem
CVE-2014-9381 MEDIUM 5.0 DOWNGRADE Integer signedness error in the dissector_cvs function in dissectors/ec_cvs.c in Ettercap 0.8.1 allows remote
CVE-2014-9380 MEDIUM 5.0 DOWNGRADE The dissector_cvs function in dissectors/ec_cvs.c in Ettercap 0.8.1 allows remote attackers to cause a denial

References

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