CVSS 9.6 · CRITICAL

CVE-2026-24303

Improper access control in Microsoft Partner Center allows an authorized attacker to elevate privileges over a network.

Analysis

Microsoft Partner Center contains a critical vulnerability allowing authenticated users to escalate privileges over the network. If your organization uses the Partner Center to manage Microsoft subscriptions, customers, or internal developer programs, be aware that this flaw could allow an attacker with standard access to gain unauthorized control over tenant management tools.

Severity

Score: 9.6(CRITICAL)

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

AV: NETWORK

AC: LOW

PR: LOW

UI: NONE

S: CHANGED

C: HIGH

I: HIGH

A: NONE

Weakness (CWE): CWE-284

EPSS

Probability of exploitation (next 30 days): 0.0006 (0.1%)

Percentile: 16.9%

EPSS: 2026-05-06

Affects

microsoft:partner_center

Technical description

Improper access control in Microsoft Partner Center allows an authorized attacker to elevate privileges over a network.

Published: 4/23/2026, 10:16:22 PM

Last modified: 4/28/2026, 12:11:27 PM

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24303

How to read this card

Actively exploited

KEV (Known Exploited Vulnerabilities) is CISA's catalog of CVEs confirmed as actively exploited in the real world. If a CVE is on KEV, someone is already using it in attacks.

CVSS 10.0

CVSS 10.0 — máxima severidad teórica. Explotable de forma remota, sin privilegios, con impacto total. Aún no confirmada como explotada en el mundo real, pero parchea ya.

AI-recommended

Un modelo de lenguaje revisó el CVE y consideró que afecta a software ampliamente desplegado o herramientas comunes de desarrollo. Un humano del equipo aprobó la publicación antes de que llegara aquí.

Categorías de impacto que evalúa la IA

widely_deployed_infra — kernel Linux, OpenSSL, glibc, k8s, Docker, nginx, OpenSSH.

popular_dev_tooling — Node.js, Python, Go, React, Next.js, librerías comunes de npm/pip.

common_consumer_software — Chrome, Firefox, Windows, macOS, apps móviles populares.

enterprise_saas — GitHub, GitLab, Atlassian, Salesforce, Cisco, Fortinet, Ivanti.

niche_software — CMS regionales, herramientas de hobby, librerías de poco uso.

not_relevant — firmware específico de proveedor, software descontinuado.

EPSS — EPSS (Exploit Prediction Scoring System) by FIRST.org estimates the probability that a CVE will be exploited in the next 30 days. Range is 0 to 1; very fresh CVEs typically score low until evidence accumulates.