Is CVE-2012-1421 in the CISA KEV catalog?

No. CVE-2012-1421 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-1421?

CVE-2012-1421 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2012-1421?

CVE-2012-1421 has an EPSS score of 89.33% (100th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2012-1421

MEDIUMEPSS 100th pctl

4.3

CVSS v2

NVD

Description

The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Norman Antivirus 6.06.12, Rising Antivirus 22.83.00.03, and AVEngine 20101.3.0.103 in Symantec Endpoint Protection 11 allows remote attackers to bypass malware detection via a POSIX TAR file with an initial MSCF character sequence. NOTE: this may later be SPLIT into multiple CVEs if additional information is published showing that the error occurred independently in different TAR parser implementations.

CWE-264

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

89.33%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% 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.