EUVD-2026-73655
GHSA-vq98-mxj2-92x5
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low privileges required; high complexity reflects heap grooming prerequisite; full CIA impact due to Credential Guard's role protecting sensitive secrets.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Credential Guard allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in Windows Credential Guard enables a local low-privileged attacker to escalate privileges to full system control across multiple Windows 10 and Windows 11 releases. The vulnerability (CWE-122) resides in the virtualization-based security component responsible for isolating credential material, meaning successful exploitation can directly undermine the primary defense protecting NTLM hashes and Kerberos tickets. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authorized (low-privileged) attacker with existing local code execution on the targeted Windows system - the CVSS PR:L/AV:L vector confirms that no remote, unauthenticated path exists. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score with AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H accurately captures a meaningful but not trivially exploitable local privilege escalation. … 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 | Microsoft has released patches for all affected Windows branches addressing this heap overflow. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10 and Windows 11 systems and identify those processing sensitive workloads or credential material, as these pose the highest risk if compromised. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today