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Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability

Critical Listed in CISA KEV
CVECVE-2025-20333
First seen2025-09-25 00:00 UTC
Disclosed2025-09-25 00:00 UTC
Last updated2026-07-15 01:16 UTC
Channel statuspending_review

Summary

Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Software VPN Web Server contain a buffer overflow vulnerability that allows for remote code execution. This vulnerability could be chained with CVE-2025-20362.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

  • Cisco:Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense

Sources

  • CISA KEV DATABASE

Original Links

Timeline

  1. kev_added CISA KEV
  2. kev_ingest CISA KEV