CVE-2018-0296A 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…
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It affects cisco adaptive_security_appliance_software and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022. Treat that date as your deadline.
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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.
- CVSS
- 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-20
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 99.91% (percentile 100)
- Assigned by
- cisco
- NVD analysis
- Analyzed
- Record last updated
- Jan 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
cisco adaptive_security_appliance_software cisco:adaptive_security_appliance_software | from 9.1 before 9.1.7.29; from 9.2 before 9.2.4.33; from 9.3 before 9.4.4.18; from 9.5 before 9.6.4.8; from 9.7 before 9.7.1.24; from 9.8 before 9.8.2.28; from 9.9 before 9.9.2.1 | NVD |
cisco firepower_threat_defense cisco:firepower_threat_defense | 6.2.3-85.02; 6.2.3-851 | NVD |
cisco secure_firewall_threat_defense cisco:secure_firewall_threat_defense | from 6.0 before 6.1.0; from 6.2.1 before 6.2.2.3; 6.2.3; 6.2.3.1 | NVD |
References
- http://www.securityfocus.com/bid/104612vdb-entry, x-refsource-bid, third-party-advisory
- https://www.exploit-db.com/exploits/44956/exploit, x-refsource-exploit-db, third-party-advisory, vdb-entry
- http://www.securitytracker.com/id/1041076vdb-entry, x-refsource-sectrack, third-party-advisory
- https://ics-cert.us-cert.gov/advisories/ICSA-18-184-01x-refsource-misc, third-party-advisory, us-government-resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-asaftdx-refsource-confirm, vendor-advisory
- http://packetstormsecurity.com/files/154017/Cisco-Adaptive-Security-Appliance-Path-Traversal.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0296us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.