Vulnerability in Cisco Asr 9001

CVE-2015-6297

The DHCPv6 server in Cisco IOS on ASR 9000 devices with software 5.2.0 Base allows remote attackers to cause a denial of service (process reset) via crafted packets, aka Bug ID CSCun36525.

Published 2015-09-18 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.024 (83.7th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Cisco Asr 9001
Cisco Asr 9006
Cisco Asr 9010
Cisco Asr 9904
Cisco Asr 9912
Cisco Asr 9922
Cisco iOS Xr — versions 5.2.0_base

Weakness classification (CWE)

CWE-399

References

tools.cisco.com/security/center/viewAlert.x (vendor-advisory, Vendor Advisory)
www.securitytracker.com/id/1033614 (VDB Entry, Third Party Advisory, vdb-entry)