CVE-2002-0556: Directory traversal vulnerability in Quik-Serv HTTP server 1.1B allows remote attackers to read arbitrary file

This month

MEDIUM 5.0DOWNGRADE

CVE-2002-0556 is a medium-severity flaw (CVSS 5.0) affecting quik-serv webserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in Quik-Serv HTTP server 1.1B allows remote attackers to read arbitrary files via a .. (dot dot) in a URL.

Why this priority

EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	4.3% (top 9%)
CISA exploited list	No
Published	2002-07-03
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: deep forest software

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

Am I affected?

Timeline

2002-07-03 04:00 UTCPublished CVE record published
2026-06-16 21:57 UTCUpdated Record last modified

deep forest software quik-serv webserver DOWNGRADE

Affected: 1.1b

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1b

1. Check installed version

apt-cache policy quik-serv-webserver || rpm -q quik-serv-webserver || quik-serv-webserver --version

2. No fixed release: DOWNGRADE to a release before 1.1b (Debian / Ubuntu)

apt-cache madison quik-serv-webserver sudo apt install quik-serv-webserver=<VERSION_BEFORE_1.1b> sudo apt-mark hold quik-serv-webserver

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

dnf --showduplicates list quik-serv-webserver sudo dnf downgrade quik-serv-webserver-<VERSION_BEFORE_1.1b> sudo dnf versionlock add quik-serv-webserver

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-2002-0556?

quik-serv webserver: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-0556 being exploited?

CVE-2002-0556 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-2002-0556 affect?

CVE-2002-0556 affects quik-serv webserver. Severity is medium (CVSS 5.0). Directory traversal vulnerability in Quik-Serv HTTP server 1.1B allows remote attackers to read arbitrary files via a .. (dot dot) in a URL.

How urgent is CVE-2002-0556?

Priority 45/100. EPSS top 9%: very likely to be exploited; Public exploit reference

References

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