Technology · Microsoft
Microsoft Exchange Server vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 52 vulnerabilities in Microsoft Exchange Server: 0 in the last 7 days and 16 in the last 90 days, 20 of them critical and 18 exploited in the wild. The most recent, CVE-2026-69641, was published on 8 September 2026.
- Last 7 days
- 0
- Last 90 days
- 16
- Critical, all time
- 20
- Exploited in the wild
- 18
About Microsoft Exchange Server
A mail server and calendaring server that runs on Windows Server operating systems.
Latest Microsoft Exchange Server vulnerabilities
- 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%
- CVE-2026-62913: Microsoft Exchange Server heap-based buffer overflowhighCVSS 8.8EPSS 0.9%
- CVE-2026-62912: Microsoft Exchange Server deserialization vulnerabilitymediumCVSS 6.5EPSS 2.0%
- CVE-2026-62910: Microsoft Exchange Server privilege escalation via resource injectionhighCVSS 7.2EPSS 1.0%
- CVE-2026-55006: Microsoft Exchange Server privilege escalation via insufficient access controlhighCVSS 7.8
- CVE-2026-47631: Microsoft Exchange Server cross-site scripting spoofing vulnerabilityhighCVSS 8.1
- CVE-2026-45583: Microsoft Exchange Server code injectionhighCVSS 7.5
- CVE-2026-45504: Microsoft Exchange Server privilege escalation via SSRFhighCVSS 8.8
- CVE-2026-45503: Microsoft Exchange Server SSRF in Server ComponenthighCVSS 8.1
- CVE-2026-45502: Microsoft Exchange Server SSRF information disclosuremediumCVSS 5
- CVE-2026-45501: Microsoft Exchange Server XSS and spoofing vulnerabilitymediumCVSS 6.5
- CVE-2026-45500: Microsoft Exchange Server cross-site scriptingmediumCVSS 6.1
- CVE-2026-42897: Microsoft Exchange Server cross-site scripting in Outlook Web Accesscriticalexploited in the wildCVSS 8.1EPSS 0.2%
- CVE-2023-21529: Microsoft Exchange Server deserialization remote code executioncriticalexploited in the wildCVSS 8.8EPSS 31.8%
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-2020-17144: Microsoft Exchange Server Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2020-0688: Microsoft Exchange Server Validation Key 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
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 1 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 6 | 0 | |
| 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 |
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, 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, 26 September 2026.