onyx

onyx --cves cve-2025-20363

CVE-2025-20363

CRITKEVCisco ASA
score
<0.1
cvss
9.0
epss
6.9%
published
2025-09-25
kev added
2025-10-06
first seen

Cisco Secure Firewall ASA, FTD, IOS, IOS XE, and IOS XR Software contain a remote code execution vulnerability caused by improper validation of user-supplied input in HTTP requests, letting remote attackers execute arbitrary code as root, exploit requires crafted HTTP requests and additional system information.

Timeline

How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.

events2025-09-25 — PublishedP2025-10-06 — Added to CISA KEVK2026-10-21 — Tracked by OnyxTscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 6.9%2026-09-23: epss 6.9%2026-09-24: epss 6.9%2026-09-25: epss 6.9%2026-09-26: epss 6.9%2026-09-27: epss 6.9%2026-09-29: epss 6.9%2026-09-30: epss 6.9%2026-10-01: epss 6.9%2026-10-02: epss 6.9%2026-10-03: epss 6.9%2026-10-04: epss 6.9%2026-10-05: epss 6.9%2026-10-06: epss 6.9%2026-10-07: epss 6.9%2026-10-08: epss 6.9%2026-10-09: epss 6.9%2026-10-10: epss 6.9%2026-10-11: epss 6.9%2026-10-12: epss 6.9%2026-10-13: epss 6.9%2026-10-14: epss 6.9%2026-10-15: epss 6.9%2026-10-16: epss 6.9%2026-10-18: epss 6.9%2026-10-19: epss 6.9%2026-10-20: epss 6.9%2026-10-21: epss 6.9%6.9%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Added to CISA KEV
  3. Tracked by Onyx

Weaknesses

CWE-122

References 8