How severe is CVE-2026-4315?

CVE-2026-4315 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-4315 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4315?

CVE-2026-4315 primarily affects Watchguard Fireware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-4315?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-4315 have an EU (EUVD) identifier?

Yes. CVE-2026-4315 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17081.

When was CVE-2026-4315 published?

CVE-2026-4315 was published on 2026-03-30 and last updated on 2026-08-14.

CVE-2026-4315

CVE-2026-4315 is a medium-severity vulnerability in Watchguard Fireware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17081
Weakness: CWE-352
Affected product: Watchguard Fireware
Published: 2026-03-30
Last modified: 2026-08-14

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.

Frequently asked questions

What is CVE-2026-4315?: 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.
How severe is CVE-2026-4315?: CVE-2026-4315 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-4315 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4315?: CVE-2026-4315 primarily affects Watchguard Fireware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-4315?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4315 have an EU (EUVD) identifier?: Yes. CVE-2026-4315 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17081.
When was CVE-2026-4315 published?: CVE-2026-4315 was published on 2026-03-30 and last updated on 2026-08-14.

References

Affected products (3)

cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:11.12.4:-:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:11.12.4:u1:*:*:*:*:*:*

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