---
id: CVE-2026-45501
title: >-
  Server-side request forgery (ssrf) in Microsoft Exchange Server allows an
  authorized attacker to perform spoofing over a network.
summary: >-
  Server-side request forgery (ssrf) in Microsoft Exchange Server allows an
  authorized attacker to perform spoofing over a network.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-918
  - CWE-79
vendor: microsoft
product: exchange_server
affected:
  - exchange_server = 2016
  - exchange_server = 2019
  - exchange_server_subscription_edition < 15.02.2562.043
patched:
  - exchange_server_subscription_edition 15.02.2562.043
published: '2026-06-09'
updated: '2026-07-28'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45501'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45501'
    label: secure@microsoft.com
tags:
  - nvd
epss: 0.00308
epssPercentile: 0.23861
ingestedAt: '2026-07-28T23:40:23.539Z'
---

## Overview

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.

## Affected

- `exchange_server = 2016`
- `exchange_server = 2019`
- `exchange_server_subscription_edition < 15.02.2562.043`

## Remediation

Upgrade past the affected range:

- `exchange_server_subscription_edition 15.02.2562.043`