Improper input validation in Cisco iOS

CVE-2014-3299

Cisco IOS allows remote authenticated users to cause a denial of service (device reload) via malformed IPsec packets, aka Bug ID CSCui79745.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2014-06-25 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 6.8 (Medium). Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.031 (87.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Cisco iOS

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.securityfocus.com/bid/68177 (VDB Entry, Third Party Advisory, vdb-entry)
secunia.com/advisories/59382 (third-party-advisory)
tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3299 (vendor-advisory, Vendor Advisory)
www.securitytracker.com/id/1030473 (VDB Entry, Third Party Advisory, vdb-entry)