# CVE-2026-86102 — WatchGuard AP

> As of 2026-09-28, CVE-2026-86102 is a Critical-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in WatchGuard AP, CVSS v4.0 9.3, EPSS 1.9% (79.9th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-86102, most recently “WatchGuard Fireware OS Critical Code Injection Vulnerability in BOVPN over TLS Client (CVE-2026-86131)”.

**Last updated:** 2026-09-28

## What is CVE-2026-86102?

An OS command injection vulnerability in the WatchGuard AP internal API service allows an attacker with network access to the AP to execute arbitrary shell commands on the underlying operating system.

The record classifies CVE-2026-86102 under weakness classes [CWE-78](https://intel.threadlinqs.com/cwe/CWE-78), [CWE-863](https://intel.threadlinqs.com/cwe/CWE-863). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 26 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 9.3 — Critical (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 1.9% probability of exploitation in the next 30 days, higher than 79.9% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 7.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-28

## Is CVE-2026-86102 being exploited?

It currently carries a trending score of 52 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [WatchGuard](https://intel.threadlinqs.com/vendors/watchguard): AP

## How to fix CVE-2026-86102

No vendor patch reference has been recorded for CVE-2026-86102 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-86102

1 tracked threat in the Threadlinqs corpus references CVE-2026-86102, either in the campaign’s CVE list or as an indicator on the campaign record.

- [WatchGuard Fireware OS Critical Code Injection Vulnerability in BOVPN over TLS Client (CVE-2026-86131)](https://intel.threadlinqs.com/threat/TL-2026-2813) — CRITICAL · 2026-09-30

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10.

**Vendor advisory and patch**

- [psirt.watchguard.com — vendor advisory](https://psirt.watchguard.com/CVE-2026-86102)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-86102
Full detection coverage and IOCs for threats exploiting CVE-2026-86102 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp