EUVD-2026-73753
GHSA-g72x-4c6v-cmmp
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered font exploit requires no credentials and low complexity; user interaction (file open) is the only barrier; full C/I/A impact consistent with heap overflow RCE.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Graphic Fonts allows an unauthorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow in the Windows Graphic Fonts font-processing component enables remote code execution across virtually the entire Windows ecosystem, from Server 2012 to Windows 11 26H1 and Server 2025. The attack vector is network-based with user interaction required (CVSS AV:N/UI:R), consistent with a font delivered via a malicious document or webpage that triggers the vulnerable parser. …
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 | User interaction is required: a target must open an attacker-controlled file (document, image, or web content) that triggers Windows font parsing. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score reflects a genuinely high-priority issue: network-reachable, no privileges required, low complexity, and full C/I/A impact - though user interaction (UI:R) provides a single friction point limiting automated wormable 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 security update for each applicable Windows version as documented in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-73018. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows systems by version and flag business-critical systems, particularly those handling sensitive data or external communications. …
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