8.7

CVE-2025-11838: watchguard fireware Release of Invalid Pointer or Reference

CVSS: 8.7v4.0HighModified
Published 04-12-2025Last modified 10-08-2026
Open JSON

Vulnerability summary

CVE-2025-11838 is a high (CVSS 8.7) Release of Invalid Pointer or Reference vulnerability in watchguard fireware. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.4% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.50%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 04-12-2025
    PublishedVulnerability first disclosed.
  2. 10-08-2026
    Last modifiedVulnerability information updated.

Description

A memory corruption vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker to trigger a Denial of Service (DoS) condition in the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

0.00 pp

From 0.50% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.50%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Watchguard2 products
  • fireware≥ 2025.1, < 2025.1.3 | ≥ 12.0.0, < 12.11.5
  • fireware os≥ 2025.1, ≤ 2025.1.3 | ≥ 12.6.1, ≤ 12.11.5

1 vendor · 2 products

References

2 links