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Vulnerability record · CVE-2026-24303 · published 23 April 2026

CVE-2026-24303: Microsoft partner center improper access control vulnerability

Microsoft · Partner Center

Improper certificate validation in Microsoft Partner Center allows an unauthorized attacker to elevate privileges over a network.

9.6 CVSS 3.1 Critical EPSS 0.39% · top 66.5% CWE-284 · Improper access control
9.6CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
26 Oct 2026Last modified by NVD

Description

Improper certificate validation in Microsoft Partner Center allows an unauthorized attacker to elevate privileges over a network.

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

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-2026-24303 Vendor Advisory

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Related vulnerabilities

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

9.8CVE-2024-49035Microsoft Partner Center improper access control allows privilege elevationPartner.Microsoft.com contains an improper access control flaw (CWE-269) that lets an unauthenticated attacker elevate privileges over the network. M…KEVEPSS 1.4%analysed10.0CVE-2026-96207Microsoft partner center improper certificate validation vulnerabilityImproper certificate validation in Microsoft Partner Center allows an unauthorized attacker to elevate privileges over a network.EPSS 0.67%9.8CVE-2025-65041Microsoft partner center improper authorization vulnerabilityImproper authorization in Microsoft Partner Center allows an unauthorized attacker to elevate privileges over a network.EPSS 0.77%8.8CVE-2025-29814Microsoft partner center improper input validation vulnerabilityImproper authorization in Microsoft Partner Center allows an authorized attacker to elevate privileges over a network.EPSS 2.3%8.6CVE-2026-69558Microsoft partner center insecure direct object reference vulnerabilityAuthorization bypass through user-controlled key in Microsoft Partner Center allows an unauthorized attacker to disclose information over a network.EPSS 0.97%8.2CVE-2026-34327Microsoft partner center vulnerabilityExternally controlled reference to a resource in another sphere in Microsoft Partner Center allows an unauthorized attacker to perform spoofing over …EPSS 0.64%10.0CVE-2015-3306ProFTPD mod_copy arbitrary file read and writeThe mod_copy module in ProFTPD 1.3.5 fails to restrict the SITE CPFR and SITE CPTO commands, letting remote attackers copy arbitrary files on the ser…KEVEPSS 99%analysed7.8CVE-2026-81963Windows Update Stack link-following privilege escalationWindows Update Stack resolves links improperly before accessing files, a link-following flaw (CWE-59) compounded by improper access control (CWE-284)…KEVEPSS 7.1%analysed

Source: NIST National Vulnerability Database (record CVE-2026-24303), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.