High
Fireware OS Pre-Authentication NULL Pointer Dereference Allows Remote Denial of Service
A NULL pointer dereference vulnerability in the WatchGuard Fireware OS authentication process allows a remote, unauthenticated attacker to crash the management daemon by sending a specially request to the login interface, resulting in a denial of service.
Announced Source revision 1
Original source ↗CVE-2026-86134
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-86134
Fireware OS
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Fireware OS
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "WatchGuard",
"product": "Fireware OS",
"versions": [
{
"status": "affected",
"version": "2026.3",
"lessThan": "2026.3.2",
"versionType": "custom"
},
{
"status": "affected",
"version": "2025.0",
"lessThan": "2026.2.3",
"versionType": "custom"
},
{
"status": "affected",
"version": "12.0",
"lessThan": "12.12.3",
"versionType": "custom"
}
],
"platforms": [
"Default"
],
"defaultStatus": "unaffected"
},
{
"vendor": "WatchGuard",
"product": "Fireware OS",
"versions": [
{
"status": "affected",
"version": "12.0",
"lessThan": "12.5.21",
"versionType": "custom"
}
],
"platforms": [
"T15/T35"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-86134
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #4431 · Revision 1
- Added to Heist Feed
- Publisher date