Patch Forecast
Red warning
Act within 24 hours.

CVE-2026-83782

Microsoft: heap buffer overflow

Risk score
81/100
CVSS
9.8 v3.1
Exploit chance (30 days)
1.0%
Published
13 Oct 2026

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What to know

What it is
A heap-based buffer overflow in Windows Shell allows an attacker to execute code over a network, potentially leading to code execution, information disclosure, and denial of service.
Affected
{'product': 'Windows Shell', 'vendor': 'Microsoft'}
Fix
Check the linked advisory for a fix, as none is provided in this record.
Exploitation
No known exploitation

Why it is Red

  • CVSS 9.8 critical
  • Remotely exploitable without logging in
  • Named in a government or vendor bulletin

Government and vendor bulletins

References

Original description

Heap-based buffer overflow in Windows Shell allows an unauthorized attacker to execute code over a network.

Last activity 20 Oct 2026. Patch Forecast updates every hour.