CVE-2025-20362

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2024-10-10 19:15 UTC ReservedThe CVE id was reserved by its CNA
2. 2025-09-25 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
3. 2025-09-25 16:15 UTC PublishedDisclosed publicly on CVE.org and NVD
4. 2025-09-26 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-10-18 21:10 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
• Exploit odds: 86.7% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2025-09-25 16:15 UTC

Last modified

2026-10-18 21:10 UTC

Added to CISA KEV

2025-09-25

Exploit probability

86.7% · EPSS, next 30 days

Weakness

CWE-862 · Missing authorization

Record status

Analyzed

Affected

• Cisco Adaptive Security Appliance Software < 9.12.4.72
• Cisco Adaptive Security Appliance Software < 9.14.4.28
• Cisco Adaptive Security Appliance Software < 9.16.4.85
• Cisco Adaptive Security Appliance Software < 9.18.4.67
• Cisco Adaptive Security Appliance Software < 9.20.4.10
• Cisco Adaptive Security Appliance Software < 9.22.2.14
• Cisco Adaptive Security Appliance Software < 9.23.1.19
• Cisco Secure Firewall Threat Defense < 7.0.8.1

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2025-20362.md and follow it. Check whether this project is affected by CVE-2025-20362. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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