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CVE-2025-20362VulnerabilityPublished Updated

Cisco Secure Firewall Adaptive Security Appliance Software and Secure Firewall Threat Defense Software VPN Web Server

Affects CiscoSource GCVE Database

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Authoritative record:CVE-2025-20362· Medium 6.5

Exploited in the wild · KEV due 26 Sep 2025 · public detection template (Nuclei) : apply the vendor's fix or mitigations to Cisco now.

Data as of 4 Nov 2026, 18:29 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
KEV deadline
 US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 25 Sep 2025

  2. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  3. Exploited in the wild: evidence found.

    Listed in CISA KEV the same day as disclosure

  4. Observed by OffSeq Mirage: evidence found.

    5 exposed hosts found; no attack traffic recorded

Timeline

  1. CVE ID reserved

    by Cisco Systems, Inc.

    , 350 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. In Threat Radar

    record ingested

    , 2 minutes after disclosure

  4. , the same day as disclosure

  5. KEV remediation due

    US federal deadline

    , 1 day after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), OffSeq Mirage (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 4 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Cisco CiscoAffected
  • =9.8
  • =9.8.1
  • =9.8.1.5
Fixed in–

Check the firmware or software version for Cisco in the device's admin interface against the vendor advisory.

AI-suggested

Since the vulnerability depends on specific VPN feature configurations, reviewing and potentially disabling unused or unnecessary remote access VPN features may reduce exposure. Administrators should consult Cisco's official advisory for fixed software versions and apply updates accordingly once available. Monitor Cisco's advisories for official fixes.

Description

This vulnerability affects Cisco Secure Firewall ASA Software and Secure Firewall Threat Defense (FTD) Software when specific remote access VPN features are enabled. The affected configurations include AnyConnect IKEv2 Remote Access with client services, Mobile User Security (MUS), and SSL VPN features that enable SSL listen sockets. The vulnerability impacts Cisco devices running versions 9.8, 9.8.1, and 9.8.1.5 of these software products. No CVSS score or detailed impact information is provided in the source data.

References

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