---
id: "CVE-2026-121640"
kind: "vulnerability"
aliases: ["CVE-2026-121640"]
title: "WatchGuard AuthPoint Gateway: replayed requests let attackers take admin actions"
severity: "critical"
cvss: 9.1
epss: null
exploited: false
status: "open"
category: "vendor"
products: [{"name": "AuthPoint Authentication Gateway", "fixed": ["7.6.0"], "affected": ">= 1.0, < 7.6.0", "ecosystem": "vendor"}]
ecosystems: []
tags: ["authpoint", "mfa", "replay", "self-hosted", "vendor", "watchguard"]
not_affected_if: []
published_at: "2026-11-04T15:17:42+00:00"
first_seen_at: "2026-11-04T15:27:31+00:00"
updated_at: "2026-11-04T15:30:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121640", "first_seen_at": "2026-11-04T15:27:31+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-04T15:30:31+00:00"}]
---

# WatchGuard AuthPoint Gateway: replayed requests let attackers take admin actions

WatchGuard AuthPoint Gateway before 7.6.0 does not stop replayed requests between its components. An attacker who has observed a legitimate request can replay it to perform unauthorized administrative actions, including disrupting authentication services. WatchGuard is not aware of exploitation.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:AuthPoint Authentication Gateway affected >= 1.0, < 7.6.0 fixed 7.6.0

## How to check

Check the installed AuthPoint Gateway version on each Gateway host (primary and secondary); any version below 7.6.0 is affected. The vendor advisory does not give a check command.

## Fix

Upgrade AuthPoint Gateway to 7.6.0 or later

## Timeline

- 2026-11-04T15:27:31+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121640
- 2026-11-04T15:30:31+00:00 analyst — Read WatchGuard PSIRT advisory: affected AuthPoint Gateway >=1.0,<7.6.0, fixed 7.6.0 (released 2026-10-29 per release notes). No in-the-wild exploitation known per vendor. Advisory only says attacker must have observed a legitimate request between Gateway components; does not say whether on-path is required or how to check version/mitigations (not verified). Sibling CVEs 121637/8/9 same fix.

## Documents

- [advisory] WatchGuard PSIRT CVE-2026-121640 https://psirt.watchguard.com/CVE-2026-121640
- [fix] AuthPoint release notes (Gateway 7.6.0) https://www.watchguard.com/support/release-notes/cloud/Content/en-US/AuthPoint/EN_release-notes_authpoint.html

## From the sources

An Authentication Bypass by Capture-replay vulnerability in WatchGuard AuthPoint Gateway allows an attacker who has observed a legitimate request between AuthPoint Gateway components to replay it and perform unauthorized administrative actions, including disrupting authentication services.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_