Is CVE-2012-0021 in the CISA KEV catalog?

No. CVE-2012-0021 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-0021?

CVE-2012-0021 has a CVSS v2 base score of 2.6 (LOW).

What is the EPSS score for CVE-2012-0021?

CVE-2012-0021 has an EPSS score of 30.81% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2012-0021

LOWEPSS 98th pctl

2.6

CVSS v2

NVD

Description

The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.

CWE-20Improper Input Validation

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

30.81%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.