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TI-2018-00255 Aliases CVE-2018-0296GHSA-h2mj-pqgp-xmmj

Improper input validation in Cisco Adaptive Security Appliance unknown

Priority CRITICAL 90Exploited in the wildCWE-20Published · Updated

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

Exploitation Active In CISA KEV since 2021-11-03CISA due date 2022-05-03
EPSS 0.99898 99th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

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

VendorProductAffected versionsFixed inStatusSource
—Cisco Adaptive Security Appliance unknownCisco Adaptive Security Appliance unknown—No fix listedCNA
  • Cisco Adaptive Security Appliance unknown Vendor— Affected Cisco Adaptive Security Appliance unknown Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
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 9.9.2.1VulnerableCisco
cpe:2.3:a:cisco:firepower_threat_defense:6.2.3-85.02:*:*:*:*:*:*:*6.2.3-85.02VulnerableCisco
cpe:2.3:a:cisco:firepower_threat_defense:6.2.3-851:*:*:*:*:*:*:*6.2.3-851VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*6.0 to before 6.1.0; 6.2.1 to before 6.2.2.3VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3:*:*:*:*:*:*:*6.2.3VulnerableCisco
cpe:2.3:a:cisco:secure_firewall_threat_defense:6.2.3.1:*:*:*:*:*:*:*6.2.3.1VulnerableCisco
  • 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

  1. 2021-11-03 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2018-0296
  3. 2026-10-03 Alias added: GHSA-h2mj-pqgp-xmmj

References

  • 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
See all 354 →

Sources