8.6

CVE-2026-13722: watchguard fireware

CVSS: 8.6v4.0HighAnalyzed
Published 02-07-2026Last modified 27-08-2026
Open JSON

Vulnerability summary

CVE-2026-13722 is a high (CVSS 8.6) vulnerability in watchguard fireware. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 25% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v4.0 (CVE.org)
EPSS score
0.33%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 02-07-2026
    PublishedVulnerability first disclosed.
  2. 27-08-2026
    Last modifiedVulnerability information updated.

Description

WatchGuard Fireware OS contains a firmware validation bypass when processing a backup image via the backup/restore feature. An authenticated administrator can exploit this vulnerability to install a tampered firmware image.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

+0.06 pp

From 0.27% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.33%

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, < 2026.2.1 | ≥ 12.5, ≤ 12.5.18 | ≥ 12.0, < 12.12.1 | ≥ 11.0.0, < 11.12.4 | 11.12.4 | 11.12.4:u1
  • fireware os≥ 2025.1, < 2026.2.1 | ≥ 12.0, < 12.12.1 | ≥ 11.0, ≤ 11.12.4+541730 | ≥ 12.0, < 12.11.9 | ≥ 12.0 (No fix recorded)

1 vendor · 2 products

References

2 links