Cisco Secure Firewall Adaptive Security Appliance and Cisco Secure Firewall Threat…
Priority LOW 37CWE-1287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to create or delete arbitrary files on the underlying operating system. If critical system files are manipulated, new Remote Access SSL VPN sessions could be denied and existing sessions could be dropped, causing a denial of service (DoS) condition. An exploited device requires a manual reboot to recover. This vulnerability is due to insufficient input validation when processing HTTP requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to create or delete files on the underlying operating system, which could cause the Remote Access SSL VPN service to become unresponsive. To exploit this vulnerability, the attacker must be authenticated as a VPN user of the affected device.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00482 41st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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 | Cisco Adaptive Security Appliance (ASA) Software | 9.12.3; 9.8.3; 9.12.1; 9.8.1; 9.12.2; 9.8.2.45; 9.8.2; 9.8.4; 9.14.1; 9.12.4; 9.8.2.26; 9.8.2.24; 9.8.2.15; 9.8.2.14; 9.8.2.35; 9.8.2.20; 9.8.2.8; 9.8.2.17; 9.8.2.28; 9.8.2.33; 9.8.2.38; 9.8.4.25; 9.12.3.2; 9.12.3.7; 9.8.3.18; 9.8.3.14; 9.8.4.15; 9.8.4.8; 9.8.1.7; 9.8.3.29; 9.14.1.10; 9.12.2.5; 9.8.4.22; 9.12.3.12; 9.8.4.7; 9.8.4.17; 9.8.3.16; 9.8.4.20; 9.8.3.11; 9.12.1.3; 9.8.4.3; 9.12.2.4; 9.8.4.12; 9.12.1.2; 9.8.3.26; 9.8.1.5; 9.12.2.9; 9.12.3.9; 9.8.3.21; 9.8.4.10; 9.12.2.1; 9.12.4.2; 9.14.1.6; 9.8.3.8; 9.14.1.15; 9.14.1.19; 9.8.4.26; 9.12.4.4; 9.14.1.30; 9.8.4.29; 9.12.4.7; 9.14.2; 9.12.4.8; 9.8.4.32; 9.12.4.10; 9.14.2.4; 9.14.2.8; 9.12.4.13; 9.8.4.33; 9.14.2.13; 9.8.4.34; 9.12.4.18; 9.8.4.35; 9.14.2.15; 9.12.4.24; 9.16.1; 9.8.4.39; 9.14.3; 9.12.4.26; 9.16.1.28; 9.14.3.1; 9.12.4.29; 9.14.3.9; 9.16.2; 9.12.4.30; 9.16.2.3; 9.8.4.40; 9.14.3.11; 9.12.4.35; 9.8.4.41; 9.14.3.13; 9.16.2.7; 9.12.4.37; 9.14.3.15; 9.17.1; 9.16.2.11; 9.14.3.18; 9.16.2.13; 9.12.4.39; 9.12.4.38; 9.8.4.43; 9.14.4; 9.16.2.14; 9.17.1.7; 9.12.4.40; 9.16.3.3; 9.14.4.6; 9.16.3; 9.16.3.14; 9.17.1.9; 9.14.4.7; 9.12.4.41; 9.17.1.10; 9.8.4.44; 9.18.1; 9.12.4.47; 9.14.4.12; 9.16.3.15; 9.18.1.3; 9.17.1.11; 9.12.4.48; 9.14.4.13; 9.18.2; 9.16.3.19; 9.17.1.13; 9.12.4.50; 9.14.4.14; 9.17.1.15; 9.8.4.45; 9.12.4.52; 9.14.4.15; 9.16.3.23; 9.18.2.5; 9.16.4; 9.12.4.54; 9.14.4.17; 9.8.4.46; 9.17.1.20; 9.18.2.7; 9.19.1; 9.16.4.9; 9.12.4.55; 9.18.2.8; 9.14.4.22; 9.16.4.14; 9.8.4.48; 9.18.3; 9.19.1.5; 9.14.4.23; 9.12.4.56; 9.16.4.18; 9.17.1.30; 9.19.1.9; 9.18.3.39; 9.16.4.19; 9.12.4.58; 9.19.1.12; 9.18.3.46; 9.16.4.27; 9.19.1.18; 9.18.3.53; 9.18.3.55; 9.16.4.38; 9.17.1.33; 9.12.4.62; 9.16.4.39; 9.18.3.56; 9.20.1; 9.16.4.42; 9.19.1.22; 9.18.4; 9.20.1.5; 9.18.4.5; 9.19.1.24; 9.16.4.48; 9.18.4.8; 9.20.2; 9.19.1.27; 9.12.4.65; 9.16.4.55; 9.18.4.22; 9.20.2.10; 9.16.4.57; 9.19.1.28; 9.17.1.39; 9.12.4.67; 9.14.4.24; 9.18.4.24; 9.20.2.21; 9.16.4.61; 9.19.1.31; 9.18.4.29; 9.20.2.22; 9.16.4.62; 9.18.4.34; 9.20.3; 9.16.4.67; 9.16.4.70; 9.18.4.40; 9.23.1; 9.22.1.1; 9.16.4.71; 9.20.3.4; 9.18.4.47; 9.20.3.7; 9.17.1.45; 9.19.1.37; 9.17.1.46; 9.16.4.76; 9.20.3.9; 9.19.1.38; 9.18.4.50; 9.22.1.3; 9.20.3.10; 9.22.1.2; 9.18.4.52; 9.20.3.13; 9.22.1.6; 9.18.4.53; 9.16.4.82 | — | No fix listed | CNA |
| Cisco | Cisco Firepower Threat Defense Software | 6.2.3.14; 6.4.0.1; 6.2.3.7; 6.2.3; 6.4.0.2; 6.2.3.9; 6.2.3.1; 6.2.3.2; 6.4.0.5; 6.2.3.10; 6.4.0; 6.4.0.3; 6.2.3.6; 6.4.0.4; 6.2.3.15; 6.2.3.5; 6.2.3.4; 6.2.3.3; 6.2.3.8; 6.4.0.6; 6.2.3.11; 6.2.3.12; 6.2.3.13; 6.4.0.7; 6.4.0.8; 6.6.0; 6.4.0.9; 6.2.3.16; 6.6.0.1; 6.6.1; 6.4.0.10; 6.4.0.11; 6.6.3; 6.6.4; 6.4.0.12; 7.0.0; 6.2.3.17; 7.0.0.1; 6.6.5; 7.0.1; 7.1.0; 6.4.0.13; 6.6.5.1; 6.2.3.18; 7.0.1.1; 6.4.0.14; 7.1.0.1; 6.6.5.2; 7.0.2; 6.4.0.15; 7.2.0; 7.0.2.1; 7.0.3; 6.6.7; 7.1.0.2; 7.2.0.1; 7.0.4; 7.2.1; 7.0.5; 6.4.0.16; 7.3.0; 7.2.2; 7.2.3; 6.6.7.1; 7.3.1; 7.1.0.3; 7.2.4; 7.0.6; 7.2.5; 7.2.4.1; 7.3.1.1; 7.4.0; 6.4.0.17; 7.0.6.1; 7.2.5.1; 7.4.1; 7.2.6; 7.0.6.2; 7.4.1.1; 6.6.7.2; 6.4.0.18; 7.2.7; 7.2.5.2; 7.3.1.2; 7.2.8; 7.6.0; 7.4.2; 7.2.8.1; 7.0.6.3; 7.4.2.1; 7.2.9; 7.0.7; 7.7.0; 7.4.2.2 | — | No fix listed | CNA |
- Cisco Adaptive Security Appliance (ASA) Software VendorCisco Affected 9.12.3; 9.8.3; 9.12.1; 9.8.1; 9.12.2; 9.8.2.45; 9.8.2; 9.8.4; 9.14.1; 9.12.4; 9.8.2.26; 9.8.2.24; 9.8.2.15; 9.8.2.14; 9.8.2.35; 9.8.2.20; 9.8.2.8; 9.8.2.17; 9.8.2.28; 9.8.2.33; 9.8.2.38; 9.8.4.25; 9.12.3.2; 9.12.3.7; 9.8.3.18; 9.8.3.14; 9.8.4.15; 9.8.4.8; 9.8.1.7; 9.8.3.29; 9.14.1.10; 9.12.2.5; 9.8.4.22; 9.12.3.12; 9.8.4.7; 9.8.4.17; 9.8.3.16; 9.8.4.20; 9.8.3.11; 9.12.1.3; 9.8.4.3; 9.12.2.4; 9.8.4.12; 9.12.1.2; 9.8.3.26; 9.8.1.5; 9.12.2.9; 9.12.3.9; 9.8.3.21; 9.8.4.10; 9.12.2.1; 9.12.4.2; 9.14.1.6; 9.8.3.8; 9.14.1.15; 9.14.1.19; 9.8.4.26; 9.12.4.4; 9.14.1.30; 9.8.4.29; 9.12.4.7; 9.14.2; 9.12.4.8; 9.8.4.32; 9.12.4.10; 9.14.2.4; 9.14.2.8; 9.12.4.13; 9.8.4.33; 9.14.2.13; 9.8.4.34; 9.12.4.18; 9.8.4.35; 9.14.2.15; 9.12.4.24; 9.16.1; 9.8.4.39; 9.14.3; 9.12.4.26; 9.16.1.28; 9.14.3.1; 9.12.4.29; 9.14.3.9; 9.16.2; 9.12.4.30; 9.16.2.3; 9.8.4.40; 9.14.3.11; 9.12.4.35; 9.8.4.41; 9.14.3.13; 9.16.2.7; 9.12.4.37; 9.14.3.15; 9.17.1; 9.16.2.11; 9.14.3.18; 9.16.2.13; 9.12.4.39; 9.12.4.38; 9.8.4.43; 9.14.4; 9.16.2.14; 9.17.1.7; 9.12.4.40; 9.16.3.3; 9.14.4.6; 9.16.3; 9.16.3.14; 9.17.1.9; 9.14.4.7; 9.12.4.41; 9.17.1.10; 9.8.4.44; 9.18.1; 9.12.4.47; 9.14.4.12; 9.16.3.15; 9.18.1.3; 9.17.1.11; 9.12.4.48; 9.14.4.13; 9.18.2; 9.16.3.19; 9.17.1.13; 9.12.4.50; 9.14.4.14; 9.17.1.15; 9.8.4.45; 9.12.4.52; 9.14.4.15; 9.16.3.23; 9.18.2.5; 9.16.4; 9.12.4.54; 9.14.4.17; 9.8.4.46; 9.17.1.20; 9.18.2.7; 9.19.1; 9.16.4.9; 9.12.4.55; 9.18.2.8; 9.14.4.22; 9.16.4.14; 9.8.4.48; 9.18.3; 9.19.1.5; 9.14.4.23; 9.12.4.56; 9.16.4.18; 9.17.1.30; 9.19.1.9; 9.18.3.39; 9.16.4.19; 9.12.4.58; 9.19.1.12; 9.18.3.46; 9.16.4.27; 9.19.1.18; 9.18.3.53; 9.18.3.55; 9.16.4.38; 9.17.1.33; 9.12.4.62; 9.16.4.39; 9.18.3.56; 9.20.1; 9.16.4.42; 9.19.1.22; 9.18.4; 9.20.1.5; 9.18.4.5; 9.19.1.24; 9.16.4.48; 9.18.4.8; 9.20.2; 9.19.1.27; 9.12.4.65; 9.16.4.55; 9.18.4.22; 9.20.2.10; 9.16.4.57; 9.19.1.28; 9.17.1.39; 9.12.4.67; 9.14.4.24; 9.18.4.24; 9.20.2.21; 9.16.4.61; 9.19.1.31; 9.18.4.29; 9.20.2.22; 9.16.4.62; 9.18.4.34; 9.20.3; 9.16.4.67; 9.16.4.70; 9.18.4.40; 9.23.1; 9.22.1.1; 9.16.4.71; 9.20.3.4; 9.18.4.47; 9.20.3.7; 9.17.1.45; 9.19.1.37; 9.17.1.46; 9.16.4.76; 9.20.3.9; 9.19.1.38; 9.18.4.50; 9.22.1.3; 9.20.3.10; 9.22.1.2; 9.18.4.52; 9.20.3.13; 9.22.1.6; 9.18.4.53; 9.16.4.82 Fixed in — No fix listed CNA
- Cisco Firepower Threat Defense Software VendorCisco Affected 6.2.3.14; 6.4.0.1; 6.2.3.7; 6.2.3; 6.4.0.2; 6.2.3.9; 6.2.3.1; 6.2.3.2; 6.4.0.5; 6.2.3.10; 6.4.0; 6.4.0.3; 6.2.3.6; 6.4.0.4; 6.2.3.15; 6.2.3.5; 6.2.3.4; 6.2.3.3; 6.2.3.8; 6.4.0.6; 6.2.3.11; 6.2.3.12; 6.2.3.13; 6.4.0.7; 6.4.0.8; 6.6.0; 6.4.0.9; 6.2.3.16; 6.6.0.1; 6.6.1; 6.4.0.10; 6.4.0.11; 6.6.3; 6.6.4; 6.4.0.12; 7.0.0; 6.2.3.17; 7.0.0.1; 6.6.5; 7.0.1; 7.1.0; 6.4.0.13; 6.6.5.1; 6.2.3.18; 7.0.1.1; 6.4.0.14; 7.1.0.1; 6.6.5.2; 7.0.2; 6.4.0.15; 7.2.0; 7.0.2.1; 7.0.3; 6.6.7; 7.1.0.2; 7.2.0.1; 7.0.4; 7.2.1; 7.0.5; 6.4.0.16; 7.3.0; 7.2.2; 7.2.3; 6.6.7.1; 7.3.1; 7.1.0.3; 7.2.4; 7.0.6; 7.2.5; 7.2.4.1; 7.3.1.1; 7.4.0; 6.4.0.17; 7.0.6.1; 7.2.5.1; 7.4.1; 7.2.6; 7.0.6.2; 7.4.1.1; 6.6.7.2; 6.4.0.18; 7.2.7; 7.2.5.2; 7.3.1.2; 7.2.8; 7.6.0; 7.4.2; 7.2.8.1; 7.0.6.3; 7.4.2.1; 7.2.9; 7.0.7; 7.7.0; 7.4.2.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-20251
- 2026-10-03 Alias added: GHSA-62cp-qvq6-cfw4
References
More Cisco vulnerabilities
- TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
- TI-2026-53490 Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2026-53488 Cisco Identity Services Engine Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2026-16388 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
Sources
- CVE-2025-20251 · CVE Program
- CVE-2025-20251 · NVD
- FIRST EPSS
- GHSA-62cp-qvq6-cfw4 · 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