CVE-2025-20362

Published: Sep 25, 2025Updated: Nov 6, 2025 Sources: CVE List NVD BDUCWE-862

NVD MITRE

6.5CVSSMEDIUM

EPSS Score

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Description

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.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-862

Affected Products

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software Cisco

EmbeddedOS

Networking Infrastructure / firewall

Cisco Secure Firewall Threat Defense (FTD) Software Cisco

On-premSecurity Product

Security Products

Firepower Threat Defense Cisco Systems Inc.

On-premSecurity Product

Networking Infrastructure / firewall

Adaptive Security Appliance Cisco Systems Inc.

Network Device

Networking Infrastructure / firewall

adaptive security appliance software cisco

On-premNetwork Device

Networking Infrastructure / firewall

ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.

cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco

and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

CISA Known Exploited Vulnerability

Added to KEV:Sep 25, 2025

Remediation due:Sep 26, 2025

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.

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

Official Patch Available