EUVD-2026-73110
GHSA-3v9f-499r-wx7v
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privilege attacker exploits heap overflow in Fax Service; no user interaction needed; full system compromise achieved.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Fax Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Fax Service affects a broad range of Microsoft Windows desktop and server editions, allowing a low-privileged authenticated user to achieve full system compromise through a heap-based buffer overflow. The vulnerability carries a CVSS 7.8 score with a local attack vector and requires no user interaction, making it a reliable post-exploitation escalation primitive once an attacker has any foothold on an affected system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privileged authenticated session on the target machine - remote unauthenticated exploitation is not possible given AV:L/PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately characterizes this as a reliable local privilege escalation: low complexity, no user interaction required, and full C/I/A impact on the local system. … 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 security update corresponding to the installed Windows build - fix versions are published in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72944. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows systems running Windows Fax Service and verify patch availability through Microsoft advisories. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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