CVE-2026

Api.Msrc.Microsoft • September 8, 2026

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Released: Sep 8, 2026

CWE-908: Use of Uninitialized Resource

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Please see Common Vulnerability Scoring System for more information on the definition of these metrics.

Use of uninitialized resource in Microsoft Account allows an authorized attacker to disclose information locally.

The following table provides an exploitability assessment for this vulnerability at the time of original publication.

What type of information could be disclosed by this vulnerability?

The type of information that could be disclosed if an attacker successfully exploited this vulnerability is uninitialized heap memory.

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle .

Information published.

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Multiple CVEs Disclosed on September 8, 2026, Affecting Microsoft Products On September 8, 2026, multiple CVEs were disclosed affecting various Microsoft products, including SharePoint and Office. Key vulnerabilities include improper access controls, buffer overflows, and command injections, which could allow unauthorized code execution and information disclosure. CVE-2026-85880, noted for active exploitation, was added to CISA's KEV list on the same day. Other vulnerabilities, such as CVE-2026-69428 and CVE-2026-69621, also pose significant risks due to their potential for exploitation. Organizations using affected versions of Microsoft products are urged to apply patches immediately to mitigate risks. The vulnerabilities impact a range of systems, including SharePoint Server and Microsoft Office, and could lead to severe consequences if exploited. 927 sources 74

Extracted Entities

Attack Types (1)

Data Breach

CWE Weaknesses (2)

CWE-200 - Exposure of Sensitive Information CWE-908 - Use of Uninitialized Resource