CVE-2016-9225

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

2.7% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2017-02-01 19:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:55 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.7% in the next 30 days (EPSS).
• Severity: 8.6 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2017-02-01 19:59 UTC

Last modified

2026-06-17 00:55 UTC

Exploit probability

2.7% · EPSS, next 30 days

Weakness

CWE-399

Record status

Modified

Affected

• Cisco Asa Cx context-aware Security Software 9.0.1
• Cisco Asa Cx context-aware Security Software 9.0.1-40
• Cisco Asa Cx context-aware Security Software 9.0.2
• Cisco Asa Cx context-aware Security Software 9.0.2-68
• Cisco Asa Cx context-aware Security Software 9.0_base
• Cisco Asa Cx context-aware Security Software 9.1.2-29
• Cisco Asa Cx context-aware Security Software 9.1.2-42
• Cisco Asa Cx context-aware Security Software 9.1.3-8

Attack profile CVSS 3.0 · 8.6

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

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