EUVD-2026-43871
GHSA-9q7r-6hhw-m22r
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Network-reachable image parsing with no auth (AV:N/PR:N) but mandatory user open (UI:R); shared GDI+ component yields scope change (S:C) and memory-corruption RCE gives full C/I/A:H.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Windows GDI+ (gdiplus) lets an unauthenticated network attacker run arbitrary code when a victim opens or renders a specially crafted image, via a heap-based buffer overflow (CWE-122). The flaw affects a broad range of supported Windows client and server builds (Windows 10 1607 through Windows 11 26H1, and Windows Server 2012 through 2025). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to open or render an attacker-crafted malformed image or metafile that is processed by GDI+ (gdiplus.dll) - the UI:R metric means a user action such as opening a file, previewing a thumbnail, or loading web/document content is mandatory, which limits mass automated exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals mostly align toward high priority: CVSS 9.6 with AV:N/AC:L/PR:N means low-complexity, unauthenticated, network-reachable exploitation, and S:C plus C:H/I:H/A:H indicates a scope change with total impact - consistent with a graphics-library flaw that can escape into a higher-privilege or broader context. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malformed image (or a document/web page embedding one) that triggers the GDI+ heap overflow, then delivers it via phishing email, a chat/file share, or a malicious website. When the victim opens or previews the file, gdiplus.dll parses the image and the overflow corrupts the heap, allowing the attacker to execute code in the victim's context. … |
| Remediation | Apply the Microsoft security update for CVE-2026-50380 for each affected Windows SKU - Patch available per vendor advisory - using the per-version fixed builds listed at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50380; prioritize internet-exposed and user-facing systems and any host still on Windows Server 2012/2012 R2 (verify ESU coverage). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running Windows 10 (versions 1607-26H1), Windows 11, and Windows Server (2012-2025) to quantify organizational exposure, and begin testing the patch available per vendor advisory on isolated test systems. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
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