Technology · Microsoft
Microsoft Exchange Server vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 65 vulnerabilities in Microsoft Exchange Server: 9 in the last 7 days and 22 in the last 90 days, 20 of them critical and 18 exploited in the wild. The most recent, CVE-2026-118208, was published on 10 November 2026. 3 vulnerabilities in the last four weeks, up 200% on the four before (1).
- Last 7 days
- 9
- Last 90 days
- 22
- Critical, all time
- 20
- Exploited in the wild
- 18
About Microsoft Exchange Server
Microsoft enterprise email and calendar server software for Windows environments.
Latest Microsoft Exchange Server vulnerabilities
- CVE-2026-118208: Microsoft Exchange Server improper access control spoofinghighCVSS 7.1
- CVE-2026-118207: Microsoft Exchange Server improper input validation code executionhighCVSS 8.8
- CVE-2026-118157: Microsoft Exchange Server weak authentication privilege elevationhighCVSS 7.2
- CVE-2026-118154: Microsoft Exchange Server privilege elevation via untrusted security decision inputhighCVSS 8.8
- CVE-2026-118153: Microsoft Exchange Server algorithmic complexity denial of servicehighCVSS 7.5
- CVE-2026-118152: Microsoft Exchange Server CSRF spoofingmediumCVSS 6.5
- CVE-2026-118151: Microsoft Exchange Server external control of file name or pathhighCVSS 7.2
- CVE-2026-118150: Microsoft Exchange Server authorization bypass in authenticationhighCVSS 8.8
- CVE-2026-118149: Microsoft Exchange Server code injectionhighCVSS 8.8
- CVE-2026-87696: Microsoft Exchange Server cryptographic signature verification privilege escalationhighCVSS 7.5EPSS 0.4%
- CVE-2026-87695: Microsoft Exchange Server privilege escalation via untrusted control spherehighCVSS 7.8EPSS 0.3%
- CVE-2026-87692: Microsoft Exchange Server deserialization privilege elevationhighCVSS 7.8EPSS 1.7%
- CVE-2026-96940: Microsoft Exchange Server weak authorization privilege escalationhighCVSS 8.8EPSS 0.5%
- CVE-2026-69641: Microsoft Exchange Server missing authorization allows privilege escalationcriticalCVSS 9.1EPSS 0.9%
- CVE-2026-69382: Microsoft Exchange Server weak cryptography information disclosuremediumCVSS 5.9EPSS 0.5%
- CVE-2026-69380: Microsoft Exchange Server privilege escalation over networkhighCVSS 8.1EPSS 0.7%
- CVE-2026-69378: Microsoft Exchange Server uncontrolled recursion denial of servicehighCVSS 7.5EPSS 1.2%
- CVE-2026-69375: Microsoft Exchange Server authorization bypass via user-controlled keymediumCVSS 6.5EPSS 0.7%
- CVE-2026-69361: Microsoft Exchange Server server-side request forgerymediumCVSS 6.5EPSS 0.9%
- CVE-2026-69356: Microsoft Exchange Server cross-site scripting in web page generationcriticalCVSS 9.3EPSS 0.8%
- CVE-2026-69355: Microsoft Exchange Server external control of file name or pathhighCVSS 8.8EPSS 0.9%
- CVE-2026-55007: Microsoft Exchange Server double free vulnerabilityhighCVSS 8.1EPSS 0.7%
- CVE-2026-65813: Microsoft Exchange Server SSRF privilege escalationmediumCVSS 6.5EPSS 0.9%
- CVE-2026-62915: Microsoft Exchange Server missing authorization security feature bypassmediumCVSS 6.5EPSS 0.6%
- CVE-2026-62914: Microsoft Exchange Server cross-site scripting in web page generationhighCVSS 7.3EPSS 0.4%
Most severe Microsoft Exchange Server vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2024-21410: Microsoft Exchange Server Privilege Escalation Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2022-41080: Microsoft Exchange Server Privilege Escalation Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2021-34473: Microsoft Exchange Server Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2021-34523: Microsoft Exchange Server Privilege Escalation Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2021-26855: Microsoft Exchange Server Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2023-21529: Microsoft Exchange Server deserialization remote code executioncriticalexploited in the wildCVSS 8.8EPSS 31.8%
- CVE-2022-41040: Microsoft Exchange Server Server-Side Request Forgery Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2020-0688: Microsoft Exchange Server Validation Key Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2020-17144: Microsoft Exchange Server Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2026-42897: Microsoft Exchange Server cross-site scripting in Outlook Web Accesscriticalexploited in the wildCVSS 8.1EPSS 0.2%
Vulnerabilities per week
3 vulnerabilities in the last four weeks, up 200% on the four before (1). The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 9 | 2 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 1 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 3 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 9 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Microsoft Exchange Server vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/exchange-server)<a href="https://junglewise.ai/threats/technologies/exchange-server"><img src="https://junglewise.ai/threats/technologies/exchange-server/badge.svg" alt="Microsoft Exchange Server vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/exchange-server.json, and this page as text at https://junglewise.ai/threats/technologies/exchange-server.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Microsoft Exchange Server vulnerabilities", https://junglewise.ai/threats/technologies/exchange-server, 13 November 2026.