CVE-2025-20362 MEDIUM

CVE-2025-20362

Vendor Cisco
Product Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
Weakness CWE-862 · Missing authorization
KEV Status Known Exploited
Published September 25, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

What the vulnerability does

01Description

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.

CISA mandated remediation

02CISA Required Action

The KEV due date refers to the deadline by which FCEB agencies are expected to review and begin implementing the guidance outlined in Emergency Directive (ED) 25-03 (URL listed below in Notes). Agencies must follow the mitigation steps provided by CISA (URL listed below in Notes) and vendor’s instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

Key dates

03Disclosure timeline

September 25, 2025 CVE published
February 26, 2026 Record updated

External resources

04References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-20362 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/862.html CISA KEV Reference https://www.cisa.gov/news-events/directives/ed-25-03-identify-… CISA KEV Reference https://www.cisa.gov/news-events/directives/supplemental-direc… CISA KEV Reference https://www.cisa.gov/eviction-strategies-tool/create-from-temp… CISA KEV Reference https://sec.cloudapps.cisco.com/security/center/resources/asa_… CISA KEV Reference https://sec.cloudapps.cisco.com/security/center/private/resour… CISA KEV Reference https://sec.cloudapps.cisco.com/security/center/content/CiscoS… CISA KEV Reference https://nvd.nist.gov/vuln/detail/CVE-2025-20362

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