# Microsoft Exchange Server vulnerabilities Source: https://junglewise.ai/threats/technologies/exchange-server Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/exchange-server.json License: CC BY 4.0 with a link back 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). ## Counts - Last 7 days: 9 - Last 30 days: 9 - Last 90 days: 22 - All time: 65 (20 critical, 18 exploited in the wild) ## 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 spoofing](https://junglewise.ai/threats/cve-2026-118208-improper-access-control-in-microsoft-exchange-server-allows-an) (high, CVSS 7.1, published 10 Nov 2026) - [CVE-2026-118207: Microsoft Exchange Server improper input validation code execution](https://junglewise.ai/threats/cve-2026-118207-improper-input-validation-in-microsoft-exchange-server-allows-an) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-118157: Microsoft Exchange Server weak authentication privilege elevation](https://junglewise.ai/threats/cve-2026-118157-weak-authentication-in-microsoft-exchange-server-allows-an) (high, CVSS 7.2, published 10 Nov 2026) - [CVE-2026-118154: Microsoft Exchange Server privilege elevation via untrusted security decision input](https://junglewise.ai/threats/cve-2026-118154-reliance-on-untrusted-inputs-in-a-security-decision-in-microsoft) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-118153: Microsoft Exchange Server algorithmic complexity denial of service](https://junglewise.ai/threats/cve-2026-118153-inefficient-algorithmic-complexity-in-microsoft-exchange-server) (high, CVSS 7.5, published 10 Nov 2026) - [CVE-2026-118152: Microsoft Exchange Server CSRF spoofing](https://junglewise.ai/threats/cve-2026-118152-cross-site-request-forgery-csrf-in-microsoft-exchange-server) (medium, CVSS 6.5, published 10 Nov 2026) - [CVE-2026-118151: Microsoft Exchange Server external control of file name or path](https://junglewise.ai/threats/cve-2026-118151-external-control-of-file-name-or-path-in-microsoft-exchange) (high, CVSS 7.2, published 10 Nov 2026) - [CVE-2026-118150: Microsoft Exchange Server authorization bypass in authentication](https://junglewise.ai/threats/cve-2026-118150-authorization-bypass-through-user-controlled-key-in-microsoft) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-118149: Microsoft Exchange Server code injection](https://junglewise.ai/threats/cve-2026-118149-improper-control-of-generation-of-code-code-injection-in) (high, CVSS 8.8, published 10 Nov 2026) - [CVE-2026-87696: Microsoft Exchange Server cryptographic signature verification privilege escalation](https://junglewise.ai/threats/cve-2026-87696-improper-verification-of-cryptographic-signature-in-microsoft) (high, CVSS 7.5, published 13 Oct 2026) - [CVE-2026-87695: Microsoft Exchange Server privilege escalation via untrusted control sphere](https://junglewise.ai/threats/cve-2026-87695-inclusion-of-functionality-from-untrusted-control-sphere-in) (high, CVSS 7.8, published 13 Oct 2026) - [CVE-2026-87692: Microsoft Exchange Server deserialization privilege elevation](https://junglewise.ai/threats/cve-2026-87692-deserialization-of-untrusted-data-in-microsoft-exchange-server) (high, CVSS 7.8, published 13 Oct 2026) - [CVE-2026-96940: Microsoft Exchange Server weak authorization privilege escalation](https://junglewise.ai/threats/cve-2026-96940-weak-authorization-in-microsoft-exchange-server-allows-an) (high, CVSS 8.8, published 2 Oct 2026) - [CVE-2026-69641: Microsoft Exchange Server missing authorization allows privilege escalation](https://junglewise.ai/threats/cve-2026-69641-microsoft-exchange-server-missing-authorization-allows-privilege) (critical, CVSS 9.1, published 8 Sep 2026) - [CVE-2026-69382: Microsoft Exchange Server weak cryptography information disclosure](https://junglewise.ai/threats/cve-2026-69382-microsoft-exchange-server-weak-cryptography-information) (medium, CVSS 5.9, published 8 Sep 2026) - [CVE-2026-69380: Microsoft Exchange Server privilege escalation over network](https://junglewise.ai/threats/cve-2026-69380-microsoft-exchange-server-privilege-escalation-over-network) (high, CVSS 8.1, published 8 Sep 2026) - [CVE-2026-69378: Microsoft Exchange Server uncontrolled recursion denial of service](https://junglewise.ai/threats/cve-2026-69378-microsoft-exchange-server-uncontrolled-recursion-denial-of) (high, CVSS 7.5, published 8 Sep 2026) - [CVE-2026-69375: Microsoft Exchange Server authorization bypass via user-controlled key](https://junglewise.ai/threats/cve-2026-69375-microsoft-exchange-server-authorization-bypass-via-user) (medium, CVSS 6.5, published 8 Sep 2026) - [CVE-2026-69361: Microsoft Exchange Server server-side request forgery](https://junglewise.ai/threats/cve-2026-69361-microsoft-exchange-server-server-side-request-forgery) (medium, CVSS 6.5, published 8 Sep 2026) - [CVE-2026-69356: Microsoft Exchange Server cross-site scripting in web page generation](https://junglewise.ai/threats/cve-2026-69356-microsoft-exchange-server-cross-site-scripting-in-web-page) (critical, CVSS 9.3, published 8 Sep 2026) - [CVE-2026-69355: Microsoft Exchange Server external control of file name or path](https://junglewise.ai/threats/cve-2026-69355-microsoft-exchange-server-external-control-of-file-name-or-path) (high, CVSS 8.8, published 8 Sep 2026) - [CVE-2026-55007: Microsoft Exchange Server double free vulnerability](https://junglewise.ai/threats/cve-2026-55007-microsoft-exchange-server-double-free-vulnerability) (high, CVSS 8.1, published 8 Sep 2026) - [CVE-2026-65813: Microsoft Exchange Server SSRF privilege escalation](https://junglewise.ai/threats/cve-2026-65813-microsoft-exchange-server-ssrf-privilege-escalation) (medium, CVSS 6.5, published 11 Aug 2026) - [CVE-2026-62915: Microsoft Exchange Server missing authorization security feature bypass](https://junglewise.ai/threats/cve-2026-62915-microsoft-exchange-server-missing-authorization-security-feature) (medium, CVSS 6.5, published 11 Aug 2026) - [CVE-2026-62914: Microsoft Exchange Server cross-site scripting in web page generation](https://junglewise.ai/threats/cve-2026-62914-microsoft-exchange-server-cross-site-scripting-in-web-page) (high, CVSS 7.3, published 11 Aug 2026) ## Most severe Microsoft Exchange Server vulnerabilities - [CVE-2024-21410: Microsoft Exchange Server Privilege Escalation Vulnerability](https://junglewise.ai/threats/cve-2024-21410-microsoft-exchange-server-privilege-escalation-vulnerability) (critical, exploited in the wild, CVSS 9.8, published 15 Feb 2024) - [CVE-2022-41080: Microsoft Exchange Server Privilege Escalation Vulnerability](https://junglewise.ai/threats/cve-2022-41080-microsoft-exchange-server-privilege-escalation-vulnerability) (critical, exploited in the wild, CVSS 9.8, published 10 Jan 2023) - [CVE-2021-34473: Microsoft Exchange Server Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2021-34473-microsoft-exchange-server-remote-code-execution-vulnerability) (critical, exploited in the wild, CVSS 9.8, published 3 Nov 2021) - [CVE-2021-34523: Microsoft Exchange Server Privilege Escalation Vulnerability](https://junglewise.ai/threats/cve-2021-34523-microsoft-exchange-server-privilege-escalation-vulnerability) (critical, exploited in the wild, CVSS 9.8, published 3 Nov 2021) - [CVE-2021-26855: Microsoft Exchange Server Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2021-26855-microsoft-exchange-server-remote-code-execution-vulnerability) (critical, exploited in the wild, CVSS 9.8, published 3 Nov 2021) - [CVE-2023-21529: Microsoft Exchange Server deserialization remote code execution](https://junglewise.ai/threats/cve-2023-21529-microsoft-exchange-server-deserialization-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 13 Apr 2026) - [CVE-2022-41040: Microsoft Exchange Server Server-Side Request Forgery Vulnerability](https://junglewise.ai/threats/cve-2022-41040-microsoft-exchange-server-server-side-request-forgery) (critical, exploited in the wild, CVSS 8.8, published 30 Sep 2022) - [CVE-2020-0688: Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2020-0688-microsoft-exchange-server-validation-key-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Nov 2021) - [CVE-2020-17144: Microsoft Exchange Server Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2020-17144-microsoft-exchange-server-remote-code-execution-vulnerability) (critical, exploited in the wild, CVSS 8.8, published 3 Nov 2021) - [CVE-2026-42897: Microsoft Exchange Server cross-site scripting in Outlook Web Access](https://junglewise.ai/threats/cve-2026-42897-microsoft-exchange-server-cross-site-scripting-in-outlook-web) (critical, exploited in the wild, CVSS 8.1, published 14 May 2026) ## Vulnerabilities per week 3 vulnerabilities in the last four weeks, up 200% on the four before (1). | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 9 | 2 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 1 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 3 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 9 | 0 | 0 | ## Other Microsoft technologies - [Microsoft Windows](https://junglewise.ai/threats/technologies/windows): 2,362 vulnerabilities - [Microsoft Windows 10](https://junglewise.ai/threats/technologies/windows-10): 589 vulnerabilities - [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2): 565 vulnerabilities - [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2): 534 vulnerabilities - [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025): 534 vulnerabilities - [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022): 528 vulnerabilities - [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019): 521 vulnerabilities - [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012): 517 vulnerabilities - [Microsoft Windows 11](https://junglewise.ai/threats/technologies/windows-11): 494 vulnerabilities - [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016): 476 vulnerabilities - [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809): 380 vulnerabilities - [Microsoft Windows 10 21h2](https://junglewise.ai/threats/technologies/windows-10-21h2): 373 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Microsoft Exchange Server vulnerabilities", https://junglewise.ai/threats/technologies/exchange-server, 13 November 2026.