---
id: "CVE-2026-77691"
kind: "vulnerability"
aliases: ["CVE-2026-77691"]
title: "ManageEngine Key Manager Plus: input when configuring Microsoft CA lets users attack"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["key-manager-plus", "manageengine", "microsoft-ca", "vendor", "windows"]
not_affected_if: ["managed-hosting", "no-microsoft-ca-configured", "version-7151-or-later"]
published_at: "2026-11-03T10:17:18+00:00"
first_seen_at: "2026-11-03T10:20:16+00:00"
updated_at: "2026-11-03T10:20:32+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77691", "first_seen_at": "2026-11-03T10:20:16+00:00"}]
---

# ManageEngine Key Manager Plus: input when configuring Microsoft CA lets users attack

ManageEngine Key Manager Plus versions before 7151 accept malicious input when an authenticated user configures a Microsoft certificate authority. The sources do not state the exact impact beyond this input handling flaw.

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

## How to check

- Check the installed Key Manager Plus version in the product's About page or install directory; compare against `7151`

## Fix

- Key Manager Plus: move to version `7151` or later (per the NVD description)

## Timeline

- 2026-11-03T10:20:16+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-77691

## From the sources

ZohoCorp ManageEngine Key Manager Plus versions before 7151 allow authenticated users to enter malicious input when configuring a Microsoft CA

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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_