Vulnerability in Cisco Email Security Appliance

CVE-2015-6285

Format string vulnerability in Cisco Email Security Appliance (ESA) 7.6.0 and 8.0.0 allows remote attackers to cause a denial of service (memory overwrite or service outage) via format string specifiers in an HTTP request, aka Bug ID CSCug21497.

Published 2015-09-14 · last modified 2026-06-17.

CVSS v2 metric

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

EPSS exploit prediction

EPSS: 0.014 (71.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Cisco Email Security Appliance — versions 7.6.0, 8.0.0

Weakness classification (CWE)

CWE-134 — Use of Externally-Controlled Format String

References

tools.cisco.com/security/center/viewAlert.x (vendor-advisory, Vendor Advisory)
www.securitytracker.com/id/1033531 (VDB Entry, Third Party Advisory, vdb-entry)