CVE-2026-50435: Buffer over-read in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.

highCVSS 7.8CVE-2026-50435

Buffer over-read in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.8
Published: 2026-07-14
Last updated: 2026-07-21
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-50435

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-2026-504350.24% 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-2026-50435	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
highCVE-2026-50435: Windows Overlay Filter Elevation of Privilege Vulnerabilitymsrc

Recent advisories for Buffer over-read in

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.

mediumCVE-2026-55970: Buffer Over-read vulnerability in Apache Thrift C++ bindings. This issue affects Apache Thrift…nvd · 2026-07-27
mediumCVE-2026-66337: A flaw was found in libsoup. An unsigned integer underflow in the soup_filter_input_stream_rea…nvd · 2026-07-24
unknownCVE-2026-9499: An out-of-bounds read (buffer over-read) vulnerability exists in QTextCodec::codecForName() in …nvd · 2026-07-21
mediumCVE-2026-15712: A heap buffer over-read vulnerability was discovered in libsoup's (versions: libsoup 3.0 to 3.…nvd · 2026-07-14
highCVE-2026-57968: Buffer over-read in Windows Subsystem for Linux allows an authorized attacker to elevate privi…nvd · 2026-07-14
highCVE-2026-55036: Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to execute code loc…nvd · 2026-07-14