CVE Explorer
CVE-2026-8247
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Fireware OS","vendor":"WatchGuard","versions":[{"lessThanOrEqual":"11.12.4+541730","status":"affected","version":"11.0","versionType":"semver"},{"lessThanOrEqual":"12.12","status":"affected","version":"12.0","versionType":"semver"},{"lessThanOrEqual":"12.5.18","status":"affected","version":"12.5","versionType":"semver"},{"lessThanOrEqual":"2026.2","status":"affected","version":"2025.1","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:3d95171331d9099043e988899936f82fb01256fbb9c2c05a0386b96a82415754 · sha256:b41c0fd904e4e485… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"ADJACENT","baseScore":7.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:3d95171331d9099043e988899936f82fb01256fbb9c2c05a0386b96a82415754 · sha256:b41c0fd904e4e485… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-120","description":"CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:3d95171331d9099043e988899936f82fb01256fbb9c2c05a0386b96a82415754 · sha256:b41c0fd904e4e485… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"tags":["vendor-advisory"],"url":"https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00026"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3d95171331d9099043e988899936f82fb01256fbb9c2c05a0386b96a82415754 · sha256:b41c0fd904e4e485… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.