CVE-2002-1166: Buffer overflow in John Franks WN Server 1.18.2 through 2.0.0 allows remote attackers to execute arbitrary cod

This month

HIGH 7.5DOWNGRADE

CVE-2002-1166 is a high-severity flaw (CVSS 7.5) affecting wn server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in John Franks WN Server 1.18.2 through 2.0.0 allows remote attackers to execute arbitrary code via a long GET 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	3.3% (top 11%)
CISA exploited list	No
Published	2002-10-11
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: john franks

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

Am I affected?

Timeline

2002-10-11 04:00 UTCPublished CVE record published
2026-06-16 21:58 UTCUpdated Record last modified

john franks wn server DOWNGRADE

Affected: 1.18.2 · 1.18.3 · 1.18.4 · 1.18.5 · 1.18.6 · 1.18.7 · 1.19.0 · 1.19.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.18.2

1. Check installed version

apt-cache policy wn-server || rpm -q wn-server || wn-server --version

2. No fixed release: DOWNGRADE to a release before 1.18.2 (Debian / Ubuntu)

apt-cache madison wn-server sudo apt install wn-server=<VERSION_BEFORE_1.18.2> sudo apt-mark hold wn-server

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

dnf --showduplicates list wn-server sudo dnf downgrade wn-server-<VERSION_BEFORE_1.18.2> sudo dnf versionlock add wn-server

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-2002-1166?

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

Is CVE-2002-1166 being exploited?

CVE-2002-1166 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-2002-1166 affect?

CVE-2002-1166 affects wn server. Severity is high (CVSS 7.5). Buffer overflow in John Franks WN Server 1.18.2 through 2.0.0 allows remote attackers to execute arbitrary code via a long GET request.

How urgent is CVE-2002-1166?

Priority 48/100. High severity

References

← Back to latest CVEs