Is CVE-2012-2663 being actively exploited?

CVE-2012-2663 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2012-2663?

CVE-2012-2663 has a CVSS 2.0 base score of 7.5 (HIGH).

CVE-2012-2663

HIGH · CVSS 7.5EPSS 2.7%EU EUVD

extensions/libxt_tcp.c in iptables through 1.4.21 does not match TCP SYN+FIN packets in --syn rules, which might allow remote attackers to bypass intended firewall restrictions via crafted packets. NOTE: the CVE-2012-6638 fix makes this issue less relevant.

Key facts

CVSS score: 7.5 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS score: 2.7% (86th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2012-2646)
Published: February 15, 2014
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2012-2646 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

netfilter / iptables

References

http://www.spinics.net/lists/netfilter-devel/msg21248.html(Patch, Third Party Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=826702(Issue Tracking, Mitigation, Patch, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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