CVE-2006-2222: Buffer overflow in zawhttpd 0.8.23, and possibly previous versions, allows remote attackers to cause a denial

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MEDIUM 5.0DOWNGRADE

CVE-2006-2222 is a medium-severity flaw (CVSS 5.0) affecting zawhttpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in zawhttpd 0.8.23, and possibly previous versions, allows remote attackers to cause a denial of service (daemon crash) via a request for a URI composed of several "\" (backslash) characters.

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	4.1% (top 9%)
CISA exploited list	No
Published	2006-05-05
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: norz

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

Am I affected?

Timeline

2006-05-05 19:02 UTCPublished CVE record published
2026-06-16 22:24 UTCUpdated Record last modified

norz zawhttpd DOWNGRADE

Affected: 0.8.23

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.23

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.8.23 (Debian / Ubuntu)

apt-cache madison zawhttpd sudo apt install zawhttpd=<VERSION_BEFORE_0.8.23> sudo apt-mark hold zawhttpd

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

dnf --showduplicates list zawhttpd sudo dnf downgrade zawhttpd-<VERSION_BEFORE_0.8.23> sudo dnf versionlock add zawhttpd

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: zawhttpd 0.8.23 - GET Remote Buffer Overflow (Denial of Service) (PoC)

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-2006-2222?

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

Is CVE-2006-2222 being exploited?

CVE-2006-2222 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-2006-2222 affect?

CVE-2006-2222 affects zawhttpd. Severity is medium (CVSS 5.0). Buffer overflow in zawhttpd 0.8.23, and possibly previous versions, allows remote attackers to cause a denial of service (daemon crash) via a request for a URI composed of several "\" (backslash) characters.

How urgent is CVE-2006-2222?

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

References

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