CVE-2026-50340: Use after free in Windows Runtime allows an authorized attacker to elevate privileges over a network.

Details

Source

NVD Recent CVEs (US · database · site)

Severity

high — CVSS 8.5

Published

2026-07-14

Last updated

2026-07-20

Exploitation

Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-50340

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-2026-503400.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all scored CVEs.

Referenced CVEs

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
• highCVE-2026-50340: Windows Runtime Elevation of Privilege Vulnerabilitymsrc

Recent advisories for Use after free

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.

• unknownCVE-2026-20473: In display, there is a possible memory corruption due to use after free. This could lead to lo…nvd · 2026-08-03
• highCVE-2026-67300: FreeRDP before 3.29.0 contains client-side heap use-after-free vulnerabilities in the async up…nvd · 2026-08-01
• highCVE-2026-67299: FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message p…nvd · 2026-08-01
• highCVE-2026-65981: Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, a server…nvd · 2026-07-31
• highCVE-2026-63035: A heap use-after-free vulnerability in the TransferSubscriptions service in open62541 may allo…nvd · 2026-07-30
• unknownCVE-2026-13117: An incomplete guard in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote…nvd · 2026-07-30

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