7.1

CVE-2026-4315: WatchGuard Firebox Cross-Site Request Forgery (CSRF) in Fireware Web UI

Analyzed
Published 30-03-2026Last modified 27-08-2026

Vulnerability summary

CVE-2026-4315 is a high (CVSS 7.1) Cross-Site Request Forgery (CSRF) vulnerability in watchguard fireware. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.4% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v4.0 (CVE.org)
EPSS score
0.24%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 30-03-2026
    PublishedVulnerability first disclosed.
  2. 27-08-2026
    Last modifiedVulnerability information updated.

Description

A Cross-Site Request Forgery (CSRF) vulnerability in the WatchGuard Fireware OS WebUI could allow a remote attacker to trigger a denial-of-service (DoS) condition in the Fireware Web UI by convincing an authenticated administrator into visiting a malicious web page.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

Increase +0.08 pp

From 0.17% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Watchguard2 products
  • fireware≥ 2025.1, < 2026.2 | ≥ 12.5, < 12.5.18 | ≥ 11.8, < 11.12.4 | 11.12.4 | 11.12.4:u1 | ≥ 12.0, < 12.12
  • fireware os≥ 2025.1, < 2026.2 | ≥ 12.0, < 12.12 | ≥ 11.8, ≤ 11.12.4+541730 | ≥ 12.0, < 12.11.9 | ≥ 12.0, < 12.5.18

1 vendor · 2 products

References

2 links