EUVD-2026-73399
GHSA-h43g-64p9-cj3v
Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Network delivery via crafted file, low-privilege auth required, user must open content; full triad impact from heap overflow enabling code execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Integer underflow (wrap or wraparound) in Windows GDI+ allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Privilege escalation in Windows GDI+ (Graphics Device Interface Plus) allows a network-accessible, low-privileged attacker who can induce user interaction to gain SYSTEM-level or elevated privileges via an integer underflow that triggers a heap-based buffer overflow. The vulnerability spans virtually all supported Windows releases from Server 2012 through Server 2025 and Windows 11 version 26H1, making it exceptionally broad in scope. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a low-privileged authenticated account on the network or be in a position to deliver content to a user who does (PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 8.0 (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H) reflects a meaningful but not worst-case scenario: a low-privileged account and user interaction are required, preventing fully automated, unauthenticated exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft-released security update corresponding to your Windows version and build; exact fixed build numbers are published in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68827. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Notify IT leadership and security teams of the vulnerability; begin asset discovery to identify all Windows Server 2012-2025 and Windows 11 systems in scope. …
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Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today