CVE-2026-50387: Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges locally.

highCVSS 7.8CVE-2026-50387

Stack-based buffer overflow in Windows GDI 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: 2026-07-20
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-50387

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.

Moderate exploitation riskCVE-2026-503871.9% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 78% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50387	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownexploitedNCSC-2026-0237 [1.02] [H/H] Vulnerabilities Fixed in Microsoft Officencsc-nl
unknownexploitedNCSC-2026-0237 [1.01] [H/H] Vulnerabilities fixed in Microsoft Officencsc-nl
unknownexploitedNCSC-2026-0237 [1.00] [M/H] Vulnerabilities fixed in Microsoft Officencsc-nl
unknownexploitedNCSC-2026-0231 [1.00] [M/H] Vulnerabilities fixed in Microsoft Windowsncsc-nl
highCVE-2026-50387: Windows GDI Elevation of Privilege Vulnerabilitymsrc

Recent advisories for Stack-based buffer overflow

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-2026-67822: Tenda W6-S 1.0.0.4(510) contains a stack-based buffer overflow vulnerability in the /goform/wi…nvd · 2026-07-31
unknownCVE-2026-67248: A stack-based buffer overflow vulnerability was found in the File Explorer on the ADM. The vul…nvd · 2026-07-30
mediumCVE-2026-13309: Autel MaxiCharger AC Elite Home NFC Stack-based Buffer Overflow Arbitrary Code Execution Vulne…nvd · 2026-07-29
highCVE-2026-5056: GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnera…nvd · 2026-07-29
unknownCVE-2026-12935: The TL-WR940N v6 router contains a vulnerability in its RTSP connection tracking module that c…nvd · 2026-07-29
unknownCVE-2026-55728: Stack-based Buffer Overflow (CWE-121) in `/usr/bin/ltsudo` `cmd_ipaddr_conflict` in Loytec LIP…nvd · 2026-07-24