CVE-2025-20362

HIGH CISA KEV EPSS 99.7%
Published Sep 25, 20259mo ago · Modified Jun 17, 20261w ago
8.6 CVSS 3.1
High
Find Similar
Published Sep 25, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago
KEV Listed Sep 25, 2025 9mo ago
KEV Due Sep 26, 2025 277d overdue

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 Details

Base Score
8.6
Exploitability
3.9
Impact
4.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability High

Threat Intelligence

CISA Known Exploited Overdue 277d
Added
Sep 25, 2025
Due
Sep 26, 2025

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.

EPSS Exploit Probability
99.7% percentile
Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

Affected Products 12

VendorProductVersionRange
ciscoadaptive_security_appliance_software*≥9.12  –  <9.12.4.72
ciscoadaptive_security_appliance_software*≥9.14  –  <9.14.4.28
ciscoadaptive_security_appliance_software*≥9.16  –  <9.16.4.85
ciscoadaptive_security_appliance_software*≥9.17.0  –  <9.18.4.67
ciscoadaptive_security_appliance_software*≥9.19  –  <9.20.4.10
ciscoadaptive_security_appliance_software*≥9.22  –  <9.22.2.14
ciscoadaptive_security_appliance_software*≥9.23  –  <9.23.1.19
ciscofirepower_threat_defense*≥7.0.0  –  <7.0.8.1
ciscofirepower_threat_defense*≥7.1.0  –  <7.2.10.2
ciscofirepower_threat_defense*≥7.3.0  –  <7.4.2.4
ciscofirepower_threat_defense*≥7.6.0  –  <7.6.2.1
ciscofirepower_threat_defense*≥7.7.0  –  <7.7.10.1

References 3

  • sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-YROOTUW
    Vendor Advisory
  • sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks
    Vendor Advisory
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20362
    US Government Resource

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.