What is CVE-2012-1342?

CVE-2012-1342 is a medium-severity vulnerability in Cisco Carrier Routing System, classified under Incorrect Authorization. CVSS score: 5.8/10. Published 2012-08-06.

How severe is CVE-2012-1342?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Auth bypass in Cisco Carrier Routing System

CVE-2012-1342

Cisco Carrier Routing System (CRS) 3.9, 4.0, and 4.1 allows remote attackers to bypass ACL entries via fragmented packets, aka Bug ID CSCtj10975.

Vulnerability class: Broken Access Control

Published 2012-08-06 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.015 (74.3th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Cisco Carrier Routing System — versions 3.9.0, 4.0.0, 4.1.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

www.cisco.com/cisco/software/release.html (Vendor Advisory)

Frequently asked questions

What is CVE-2012-1342?: CVE-2012-1342 is a medium-severity vulnerability in Cisco Carrier Routing System, classified under Incorrect Authorization. CVSS score: 5.8/10. Published 2012-08-06.
How severe is CVE-2012-1342?: Medium severity. CVSS v3 base score is 5.8 out of 10.