CVE-2018-0296

What it is

A vulnerability in the web interface of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. It is also possible on certain software releases that the ASA will not reload, but an attacker could view sensitive system information without authentication by using directory traversal techniques. The vulnerability is due to lack of proper input validation of the HTTP URL. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. An exploit could allow the attacker to cause a DoS condition or unauthenticated disclosure of information. This vulnerability applies to IPv4 and IPv6 HTTP traffic. This vulnerability affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD) Software that is running on the following Cisco products: 3000 Series Industrial Security Appliance (ISA), ASA 1000V Cloud Firewall, ASA 5500 Series Adaptive Security Appliances, ASA 5500-X Series Next-Generation Firewalls, ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4100 Series Security Appliance, Firepower 9300 ASA Security Module, FTD Virtual (FTDv). Cisco Bug IDs: CSCvi16029.

At a glance

Exploitability

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

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

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

Timeline

1. 2017-11-27 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2018-06-07 12:29 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2021-11-03 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
4. 2022-05-03 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-08-11 19:37 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
• Exploit odds: 99.9% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2018-06-07 12:29 UTC

Last modified

2026-08-11 19:37 UTC

Added to CISA KEV

2021-11-03

Exploit probability

99.9% · EPSS, next 30 days

Weakness

CWE-20 · Improper input validation

Record status

Analyzed

Affected

• Cisco Adaptive Security Appliance Software < 9.1.7.29
• Cisco Adaptive Security Appliance Software < 9.2.4.33
• Cisco Adaptive Security Appliance Software < 9.4.4.18
• Cisco Adaptive Security Appliance Software < 9.6.4.8
• Cisco Adaptive Security Appliance Software < 9.7.1.24
• Cisco Adaptive Security Appliance Software < 9.8.2.28
• Cisco Adaptive Security Appliance Software < 9.9.2.1
• Cisco Firepower Threat Defense 6.2.3-85.02

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

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.

Read https://cve-list.com/agent/cve/CVE-2018-0296.md and follow it. Check whether this project is affected by CVE-2018-0296. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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