Vulnerability in Cisco Content Services Gateway

CVE-2013-5552

Cisco IOS 12.4(24)MDB9 and earlier on Content Services Gateway (CSG) devices does not properly implement the "parse error drop" feature, which allows remote attackers to bypass intended access restrictions via a crafted series of packets, aka Bug ID CSCug90143.

Published 2013-11-13 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 6.4 (Medium). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.012 (66.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Cisco Content Services Gateway
Cisco iOS — versions 12.4(24)mda10, 12.4\(24\)md7, 12.4\(24\)md4

Weakness classification (CWE)

CWE-264

References

tools.cisco.com/security/center/viewAlert.x (Vendor Advisory)
tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5552 (vendor-advisory, Vendor Advisory)