CVE-2026-58545: Improper access control in Windows Kernel allows an authorized attacker to bypass a security feature locally.

mediumCVSS 5.5CVE-2026-58545

Improper access control in Windows Kernel allows an authorized attacker to bypass a security feature locally.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 5.5
Published: 2026-07-14
Last updated: 2026-07-17
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-58545

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-585450.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58545	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownexploitedNCSC-2026-0231 [1.00] [M/H] Vulnerabilities fixed in Microsoft Windowsncsc-nl
mediumCVE-2026-58545: Windows Kernel Security Feature Bypass Vulnerabilitymsrc

Recent advisories for Improper access control

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-66803: Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code ove…nvd · 2026-07-30
highCVE-2026-12945: IBM Langflow OSS 1.0.0 through 1.10.1 allows authenticated users to access and manipulate othe…nvd · 2026-07-30
criticalCVE-2026-41920: Improper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traf…nvd · 2026-07-29
lowCVE-2026-63236: An improper access control vulnerability in Koollab LMS allowed an unauthenticated attacker to…nvd · 2026-07-29
lowCVE-2026-63235: An improper access control vulnerability in Koollab LMS allowed an unauthenticated attacker to…nvd · 2026-07-29
mediumCVE-2026-17570: Improper access control in the PAM password history endpoints in Devolutions Server allows an …nvd · 2026-07-27