CVE-2026-86105
Watchguard Fireware: path traversal
- Risk score
- 47/100
- CVSS
- 7.1 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 30 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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.
- Affected
- Watchguard Fireware
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Story map
At a glance
Watchguard Fireware: Amber, patch this week. A code injection vulnerability in WatchGuard Fireware OS's BOVPN Over TLS client configuration handling allows an attacker who controls the remote VPN server to execute arbitrary commands as root on the connecting Firebox.
The flaws
- CVE-2026-86105: Path traversal (CVSS 7.1 · EPSS 0%)
- CVE-2026-86131: Code injection (CVSS 9.8 · EPSS 0%)
- CVE-2026-86134: Null pointer dereference can lead to denial of service (CVSS 7.5 · EPSS 0%)
- CVE-2026-86104: Denial of service (CVSS 7.5 · EPSS 0%)
The fix
Fix: Apply the vendor's security update; see the linked advisory.
Who is exposed: Watchguard Fireware
Where it stands
- No known exploitation
Connects to
- Same weakness: Path traversal (CWE-22). 399 other warnings in 30 days
- Same product: Earlier Watchguard Fireware warnings. 10 in the last 90 days
Why it is Yellow
- CVSS 7.1 high
References
Original 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.
Last activity 30 Sep 2026. Patch Forecast updates every hour.