CVE-2013-1121

Name: CVE-2013-1121
Creator: NVD / NIST
Published: 2013-09-19T18:55:05.54+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.06%

Last modified Jun 16, 2026

CVE-2013-1121 is a vulnerability of currently unknown severity. The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.

Metrics

EPSS Probability

1.06%

60.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Cisco	Nx-Os	All versions

References

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-1121Vendor Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-1121Vendor Advisory

Timeline

Published: Sep 19, 2013
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2013-1121?

How severe is CVE-2013-1121?

Severity scoring for CVE-2013-1121 is pending analysis. The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.

How do I fix CVE-2013-1121?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-1121?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST