What is CVE-2016-9225?

CVE-2016-9225 is a high-severity vulnerability in Cisco Asa Cx Context-Aware Security Software, classified under CWE-399. CVSS score: 8.6/10. Published 2017-02-01.

How severe is CVE-2016-9225?

High severity. CVSS v3 base score is 8.6 out of 10.

Vulnerability in Cisco Asa Cx Context-Aware Security Software

CVE-2016-9225

A vulnerability in the data plane IP fragment handler of the Cisco Adaptive Security Appliance (ASA) CX Context-Aware Security module could allow an unauthenticated, remote attacker to cause the CX module to be unable to process further traffic, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of IP fragments. An attacker could exploit this vulnerability by sending crafted fragmented IP traffic across the CX module. An exploit could allow the attacker to exhaust free packet buffers in shared memory (SHM), causing the CX module to be unable to process further traffic, resulting in a DoS condition. This vulnerability affects all versions of the ASA CX Context-Aware Security module. Cisco has not released and will not release software updates that address this vulnerability. There are no workarounds that address this vulnerability. Cisco Bug IDs: CSCva62946.

Published 2017-02-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.027 (85.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000

Affected products

Cisco Asa Cx Context-Aware Security Software — versions 9.3.3.1-13, 9.0.1, 9.3.2-1
All Versions Of The Asa Cx Context-Aware Security Module — versions all versions of the ASA CX Context-Aware Security module

Weakness classification (CWE)

CWE-399

References

www.securityfocus.com/bid/95788 (VDB Entry, Third Party Advisory, vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170125… (Vendor Advisory)
www.securitytracker.com/id/1037696 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2016-9225?: CVE-2016-9225 is a high-severity vulnerability in Cisco Asa Cx Context-Aware Security Software, classified under CWE-399. CVSS score: 8.6/10. Published 2017-02-01.
How severe is CVE-2016-9225?: High severity. CVSS v3 base score is 8.6 out of 10.