Update: On November 5, 2025, Cisco became aware of a new attack variant against devices running Cisco Secure ASA Software or Cisco Secure FTD Software releases that are affected by CVE-2025-20333 and CVE-2025-20362. This attack can cause unpatched devices to unexpectedly reload, leading to denial of service (DoS) conditions. Cisco strongly recommends that all customers upgrade to the fixed software releases that are listed in the Fixed Software ["#fs"] section of this advisory.
A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to access restricted URL endpoints that are related to remote access VPN that should otherwise be inaccessible without authentication.
This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on a device. A successful exploit could allow the attacker to access a restricted URL without authentication.
References
| Link | Resource |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-YROOTUW | Vendor Advisory |
| https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks | Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20362 | US Government Resource |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
05 Nov 2025, 21:15
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (en) Update: On November 5, 2025, Cisco became aware of a new attack variant against devices running Cisco Secure ASA Software or Cisco Secure FTD Software releases that are affected by CVE-2025-20333 and CVE-2025-20362. This attack can cause unpatched devices to unexpectedly reload, leading to denial of service (DoS) conditions. Cisco strongly recommends that all customers upgrade to the fixed software releases that are listed in the Fixed Software ["#fs"] section of this advisory. A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to access restricted URL endpoints that are related to remote access VPN that should otherwise be inaccessible without authentication. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on a device. A successful exploit could allow the attacker to access a restricted URL without authentication. |
28 Oct 2025, 13:58
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20362 - US Government Resource |
21 Oct 2025, 23:16
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| References |
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21 Oct 2025, 20:20
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| References |
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21 Oct 2025, 19:21
| Type | Values Removed | Values Added |
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| References |
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26 Sep 2025, 17:15
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (en) A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to access restricted URL endpoints that are related to remote access VPN that should otherwise be inaccessible without authentication. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on a device. A successful exploit could allow the attacker to access a restricted URL without authentication. |
26 Sep 2025, 14:09
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-YROOTUW - Vendor Advisory | |
| References | () https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks - Vendor Advisory | |
| CPE | cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* |
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| First Time |
Cisco
Cisco adaptive Security Appliance Software Cisco firepower Threat Defense |
25 Sep 2025, 18:15
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| References |
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25 Sep 2025, 16:15
| Type | Values Removed | Values Added |
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| New CVE |
Information
Published : 2025-09-25 16:15
Updated : 2025-11-05 21:15
NVD link : CVE-2025-20362
Mitre link : CVE-2025-20362
CVE.ORG link : CVE-2025-20362
JSON object : View
Products Affected
cisco
- adaptive_security_appliance_software
- firepower_threat_defense
CWE
CWE-862
Missing Authorization