CVE-2025-9242
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
91.3%
99.8th percentile
CISA KEV
Listed
Added 2025-11-12 · patch by 2025-12-03
Weakness / dates
CWE-787
Published 2025-09-17 · modified 2026-08-10
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2025-09-17 — Published (NVD)
- 2025-11-12 — Added to CISA KEV (actively exploited)
- 2025-12-03 — CISA patch-by deadline
- 2026-08-10 — Last modified (NVD)
Description
An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked process may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer. If the Firebox was previously configured with the mobile user VPN with IKEv2 or a branch office VPN using IKEv2 to a dynamic gateway peer, and both of those configurations have since been deleted, that Firebox may still be vulnerable if a branch office VPN to a static gateway peer is still configured.
Affected
References
- https://psirt.watchguard.com/CVE-2025-9242
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015
- exploit https://github.com/watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-9242/blob/main/watchTowr-vs-WatchGuard-CVE-2025-9242.py
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-9242