Cisco Secure Firewall Adaptive Security Appliance Software and Secure Firewall Threat Defense Software VPN Web Server
Affects CiscoSource GCVE Database
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
- 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:NExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 25 Sep 2025
Detectable: evidence found.
nuclei template: Cisco Secure Firewall ASA & FTD - Authentication Bypass
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV the same day as disclosure
Observed by OffSeq MirageSeen by Mirage: evidence found.
5 exposed hosts found; no attack traffic recorded
Timeline
CVE ID reserved
by Cisco Systems, Inc.
, 350 days before disclosure
CVE published
on cve.org
, t = 0
In Threat Radar
record ingested
, 2 minutes after disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed
, the same day as disclosure
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
| Product | Affected | Fixed in |
|---|---|---|
| Cisco Cisco | Affected
| 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
- sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-YROOTUW (opens in a new tab)
- sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html (opens in a new tab)
- sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks (opens in a new tab)
- software.cisco.com/download/specialrelease/5c390a2391d7c51421843b43e70e8373 (opens in a new tab)
- software.cisco.com/download/specialrelease/29ca8c3a3cc367a4c86144da9f77dabf (opens in a new tab)
- sec.cloudapps.cisco.com/security/center/softwarechecker.x (opens in a new tab)
- sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html (opens in a new tab)
- cisco.com/c/en/us/td/docs/security/asa/asa920/configuration/firewall/asa-920-firewall-config/conns-threat.html (opens in a new tab)
- cisco.com/web/about/security/psirt/security_vulnerability_policy.html (opens in a new tab)
- cisco.com/c/en/us/support/index.html (opens in a new tab)
- cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html (opens in a new tab)
- sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html (opens in a new tab)
- cisco.com/go/psirt (opens in a new tab)