Improper input validation in Cisco Adaptive Security Appliance unknown
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Cisco Adaptive Security Appliance unknown | Cisco Adaptive Security Appliance unknown | — | No fix listed | CNA |
- Cisco Adaptive Security Appliance unknown Vendor— Affected Cisco Adaptive Security Appliance unknown Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* | 9.1 to before 9.1.7.29; 9.2 to before 9.2.4.33; 9.3 to before 9.4.4.18; 9.5 to before 9.6.4.8; 9.7 to before 9.7.1.24; 9.8 to before 9.8.2.28; 9.9 to before 9.9.2.1 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:firepower_threat_defense:6.2.3-85.02:*:*:*:*:*:*:* | 6.2.3-85.02 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:firepower_threat_defense:6.2.3-851:*:*:*:*:*:*:* | 6.2.3-851 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* | 6.0 to before 6.1.0; 6.2.1 to before 6.2.2.3 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3:*:*:*:*:*:*:* | 6.2.3 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.1:*:*:*:*:*:*:* | 6.2.3.1 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* Versions 9.1 to before 9.1.7.29; 9.2 to before 9.2.4.33; 9.3 to before 9.4.4.18; 9.5 to before 9.6.4.8; 9.7 to before 9.7.1.24; 9.8 to before 9.8.2.28; 9.9 to before 9.9.2.1 Vulnerable ·Cisco
- cpe:2.3:a:cisco:firepower_threat_defense:6.2.3-85.02:*:*:*:*:*:*:* Versions 6.2.3-85.02 Vulnerable ·Cisco
- cpe:2.3:a:cisco:firepower_threat_defense:6.2.3-851:*:*:*:*:*:*:* Versions 6.2.3-851 Vulnerable ·Cisco
- cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* Versions 6.0 to before 6.1.0; 6.2.1 to before 6.2.2.3 Vulnerable ·Cisco
- cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3:*:*:*:*:*:*:* Versions 6.2.3 Vulnerable ·Cisco
- cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.1:*:*:*:*:*:*:* Versions 6.2.3.1 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2021-11-03 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2018-0296
- 2026-10-03 Alias added: GHSA-h2mj-pqgp-xmmj
References
More Cisco Adaptive Security Appliance Software vulnerabilities
- TI-2025-14628 Buffer overflow in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.9
- TI-2016-05454 Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on… KEVCVSS 3.1HIGH 8.8
- TI-2023-06973 Authentication bypass in Cisco Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.1
- TI-2026-82192 Denial of service in Cisco Secure Firewall ASA and FTD SSL VPN KEVCVSS 3.1HIGH 8.6
- TI-2026-16533 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense… KEVCVSS 3.1HIGH 8.6
- TI-2025-14657 Missing authorization in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1HIGH 8.6
Sources
- CVE-2018-0296 · CVE Program
- CVE-2018-0296 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-h2mj-pqgp-xmmj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences