CVE-2026-20817
HighCVSS 7.8Exploitation Probability (EPSS)
Very high risk92th percentile - higher than 92% of all known CVEs
Summary
Improper handling of insufficient permissions in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
Risk Assessment
An attacker with appropriate permissions may gain higher privileges in the system, potentially leading to serious security breaches.
Recommendation
It is recommended to monitor and restrict access to Windows Error Reporting and to regularly update the system to patch this vulnerability.
Other vulnerabilities in Windows Error Reporting
See all- CVE-2026-97815Critical
Windows Error Reporting is affected by a heap-based buffer overflow vulnerability. This allows an unauthorized attacker to execute code over a network.
- CVE-2026-83748Critical
Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.
- CVE-2026-83693Critical
Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.
- CVE-2026-83519Critical
Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.
- CVE-2019-0863HighActively exploited
An elevation of privilege vulnerability in Windows Error Reporting (WER), due to improper file handling. A local attacker could exploit this to gain elevated privileges.
- CVE-2026-97798High
Improper neutralization of argument delimiters in a command ('argument injection') in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
- CVE-2026-85800High
A heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
- CVE-2026-85354High
Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
- CVE-2026-83916High
Double free in Windows Error Reporting allows an authorized attacker to execute code locally.
- CVE-2026-83840High
Weak authentication in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
Original NVD description (English source)
Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS