The IPv6 implementation in Cisco Adaptive Security Appliance (ASA) Software 9.1.3 and earlier, when NAT64 or NAT66 is enabled, does not pro…

published 2013-11-13 12y ago modified 2026-06-16 4mo ago also EUVD-2013-5400

cvss: 5.4; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits: 0; none known

The IPv6 implementation in Cisco Adaptive Security Appliance (ASA) Software 9.1.3 and earlier, when NAT64 or NAT66 is enabled, does not properly process NAT rules, which allows remote attackers to cause a denial of service (device reload) via crafted packets, aka Bug ID CSCue34342.

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Exploit prediction

2.03% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	5.4	AV:N/AC:H/Au:N/C:N/I:N/A:C

Classification

Weakness

CWE-20 Improper Input Validation

References

tools.cisco.com /security/center/content/CiscoSecurityNotice/CVE-2013-5560
vendor-advisory
tools.cisco.com /security/center/viewAlert.x?alertId=31716
vendor-advisory

Sources

CVE List CVE-2013-5560
NVD CVE-2013-5560

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