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CVE-2026-8247

HIGH
7.7
CVSS 4.0
Description
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code. This vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.

Metadata

CVE ID
CVE-2026-8247
State
PUBLISHED
Assigner
WatchGuard
Reserved
2026-05-10 12:48 UTC
Published
2026-07-02 23:07 UTC
Last updated
2026-07-02 23:07 UTC
Primary CWE
CWE-120
CWE-120 Buffer Copy without Checking Size of Input ('Classic…
Vendor / Product
WatchGuard / Fireware OS
Sources
cve.org  ·  NVD

Severity & Metrics

7.7 HIGH CVSS 4.0
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products (1)
VendorProductPlatformVersions
WatchGuard Fireware OS — 11.0 ≤ 11.12.4+541730, 12.0 ≤ 12.12, 12.5 ≤ 12.5.18, 2025.1 ≤ 2026.2
Weakness (CWE)
CWESourceDescription
CWE-120 cna CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.7 HIGH 4.0 cna CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References (1)
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