Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-86105
WatchGuard Fireware OS — Fireware OS Improper Authorization in Access Portal Reverse Proxy
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L P L N H L N 6.0 .0036 27.2 —
AFFECTED
Product Versions Fixed
Fireware OS 2026.3 – —
Fireware OS 12.0 – —
TIMELINE
Sep 5 Reserved by WatchGuard
Sep 29 Published (CNA: WatchGuard)
Sep 30 RESCORED — CVE-2026-86105 (WatchGuard Fireware OS). CVSS 5.3 → 6 (NVD).
Description
An improper authorization vulnerability in Fireware OS's Access Portal reverse proxy allows an authenticated, low-privileged Access Portal user to access other web applications they are not authorized for by sending a specially crafted request for a different resource which they are authorized to access.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| September 5, 2026 | Reserved | Reserved by WatchGuard |
| September 29, 2026 | Published | Published (CNA: WatchGuard) |
| September 30, 2026 | RESCORED | RESCORED — CVE-2026-86105 (WatchGuard Fireware OS). CVSS 5.3 → 6 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| WatchGuard | Fireware OS | — | 2026.3 | — |
| WatchGuard | Fireware OS | — | 12.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-86105 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
