CVE-2002-2091: Format string vulnerability in Deception Finger Daemon, decfingerd, 0.7 may allow remote attackers to execute

This month

HIGH 7.5DOWNGRADE

CVE-2002-2091 is a high-severity flaw (CVSS 7.5) affecting decfingerd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Format string vulnerability in Deception Finger Daemon, decfingerd, 0.7 may allow remote attackers to execute arbitrary code via the username of a finger request.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.5% (top 11%)
CISA exploited list	No
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: decfingerd

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

Am I affected?

Timeline

2002-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:00 UTCUpdated Record last modified

decfingerd decfingerd DOWNGRADE

Affected: 0.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.7 (Debian / Ubuntu)

apt-cache madison decfingerd sudo apt install decfingerd=<VERSION_BEFORE_0.7> sudo apt-mark hold decfingerd

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

dnf --showduplicates list decfingerd sudo dnf downgrade decfingerd-<VERSION_BEFORE_0.7> sudo dnf versionlock add decfingerd

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.

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-2002-2091?

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

Is CVE-2002-2091 being exploited?

CVE-2002-2091 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-2002-2091 affect?

CVE-2002-2091 affects decfingerd. Severity is high (CVSS 7.5). Format string vulnerability in Deception Finger Daemon, decfingerd, 0.7 may allow remote attackers to execute arbitrary code via the username of a finger request.

How urgent is CVE-2002-2091?

Priority 49/100. High severity

References

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