---
id: CVE-2026-45504
title: >-
  Server-side request forgery (ssrf) in Microsoft Exchange Server allows an
  authorized attacker to elevate privileges over a network.
summary: >-
  Server-side request forgery (ssrf) in Microsoft Exchange Server allows an
  authorized attacker to elevate privileges over a network.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-918
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-2026-45504'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504'
    label: secure@microsoft.com
tags:
  - nvd
  - exploit-available
  - cve.org
epss: 0.00846
epssPercentile: 0.56551
ingestedAt: '2026-07-28T23:40:23.620Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/hawktrace/CVE-2026-45504'
  checkedAt: '2026-09-24T07:53:04.104Z'
exploitAvailable: true
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-06-10T03:56:08.420862Z'
---

## Overview

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges 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`