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Vulnerability record · CVE-2026-65801 · published 20 August 2026

CVE-2026-65801: Microsoft exchange online server-side request forgery (ssrf) vulnerability

Microsoft · Exchange Online

Server-side request forgery (ssrf) in Microsoft Exchange Online allows an unauthorized attacker to elevate privileges over a network.

10.0 CVSS 3.1 Critical EPSS 0.90% · top 41.9% CWE-918 · Server-side request forgery (SSRF)
10.0CVSS 3.1 base score
0.90%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
24 Aug 2026Last modified by NVD

Description

Server-side request forgery (ssrf) in Microsoft Exchange Online allows an unauthorized attacker to elevate privileges over a network.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65801 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-56191Microsoft exchange online improper authentication vulnerabilityImproper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.EPSS 0.90%9.6CVE-2026-48582Microsoft exchange online missing authorization vulnerabilityMissing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.EPSS 0.69%8.8CVE-2026-54998Microsoft exchange online incorrect authorization vulnerabilityIncorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.EPSS 0.78%7.5CVE-2026-48579Microsoft exchange online improper authorization vulnerabilityImproper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.EPSS 1.00%10.0CVE-2026-83548SonicWall SMA1000 pre-auth SSRF via alternate access pathThe SMA1000 Appliance Work Place interface exposes an unintended alternate access path that allows server-side request forgery before authentication.…KEVEPSS 8.8%analysed10.0CVE-2026-49869Kestra OSS auth bypass via path suffix match enables RCEKestra OSS AuthenticationFilter whitelists the public config endpoint using request.getPath().endsWith("/configs"), a suffix match instead of an exac…KEVEPSS 2.1%analysed9.3CVE-2026-64849MLflow unauthenticated webhook test endpoint SSRF via redirectMLflow before 3.15.0 validates the webhook URL only on the original request, while the delivery code follows redirects and re-resolves the hostname w…KEVEPSS 9.8%analysed10.0CVE-2026-15409SonicWall SMA1000 Work Place SSRF allows unauthenticated requestsThe SMA1000 Appliance Work Place interface contains a server-side request forgery flaw (CWE-918) that lets the appliance be induced to make requests …KEVEPSS 6.8%analysed

Source: NIST National Vulnerability Database (record CVE-2026-65801), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.