CVE-2018-0296
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.
Key facts
- CVSS score
- 7.5 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
- CWE-20
- EPSS score
- 99.9% (100th percentile)
- In CISA KEV
- Yes, added November 3, 2021
- In EU EUVD
- Yes (EUVD-2018-1119)
- Published
- June 7, 2018
- NVD last modified
- August 11, 2026
- Status
- Analyzed
CISA Known Exploited Vulnerability
Cisco Adaptive Security Appliance (ASA) Denial-of-Service Vulnerability
Added to the KEV catalog on November 3, 2021; federal remediation due May 3, 2022.
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2018-1119 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on January 12, 2026.
View on the EU Vulnerability DatabaseAffected products
- cisco / adaptive security appliance software
- cisco / firepower threat defense
- cisco / firepower threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
Certified products that may be affected
1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.
- Cisco Adaptive Security Appliances Version: ASA software version 9.1(2) Components: ASA 5500 (5505, 5510, 5520, 5540, 5550, 5580-20-40), ASA 5500-X Series (5512-X, 5515-X, 5525-X, 5545-X, 5555-X), ASA 5585-X (5585-10, 5585-20, 5585-40, 5585-60), ASA Services Module (ASA-SM) - Cisco Systems, Inc. - Common Criteria Certificate Number: 2013/86 - archived
References
- http://packetstormsecurity.com/files/154017/Cisco-Adaptive-Security-Appliance-Path-Traversal.html(Exploit, Third Party Advisory, VDB Entry)
- http://www.securityfocus.com/bid/104612(Third Party Advisory, VDB Entry)
- http://www.securitytracker.com/id/1041076(Third Party Advisory, VDB Entry)
- https://ics-cert.us-cert.gov/advisories/ICSA-18-184-01(Third Party Advisory, US Government Resource)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-asaftd(Vendor Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0296(US Government Resource)
- https://www.exploit-db.com/exploits/44956/(Exploit, Third Party Advisory, VDB Entry)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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