CVE-2012-5640: thttpd has a local DoS vulnerability via specially-crafted .htpasswd files

Routine

MEDIUM 5.5MITIGATE

CVE-2012-5640 is a medium-severity flaw (CVSS 5.5) affecting thttpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

thttpd has a local DoS vulnerability via specially-crafted .htpasswd files

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-476
Published	2019-11-25
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: acme

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

Am I affected?

Timeline

2019-11-25 15:15 UTCPublished CVE record published
2026-06-16 23:47 UTCUpdated Record last modified

acme thttpd MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2012-5640?

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

Is CVE-2012-5640 being exploited?

CVE-2012-5640 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-2012-5640 affect?

CVE-2012-5640 affects thttpd. Severity is medium (CVSS 5.5). thttpd has a local DoS vulnerability via specially-crafted .htpasswd files

How urgent is CVE-2012-5640?

Priority 27/100. No elevated risk signals yet.

Related CVEs

CVE-2000-0900 HIGH 7.5 DOWNGRADE Directory traversal vulnerability in ssi CGI program in thttpd 2.19 and earlier allows remote attackers to rea
CVE-2017-17663 CRITICAL 9.8 UPGRADE UPGRADE The htpasswd implementation of mini_httpd before v1.28 and of thttpd before v2.28 is affected by a buffer over
CVE-2013-0348 LOW 2.1 UPGRADE MITIGATE thttpd.c in sthttpd before 2.26.4-r2 and thttpd 2.25b use world-readable permissions for /var/log/thttpd.log,
CVE-2009-4491 CRITICAL 9.8 DOWNGRADE thttpd 2.25b0 writes data to a log file without sanitizing non-printable characters, which might allow remote
CVE-2007-0664 MEDIUM 5.0 UPGRADE thttpd before 2.25b-r6 in Gentoo Linux is started from the system root directory (/) by the Gentoo baselayout

References

← Back to latest CVEs