Windows RDP
CVE-2020-16863 — Windows Remote Desktop Service Denial of Service Vulnerability
Executive Summary
A denial of service vulnerability exists in Windows Remote Desktop Service when an attacker connects to the target system using RDP and sends specially crafted requests. An attacker who successfully exploited this vulnerability could cause the Remote Desktop Service on the target system to stop responding. To exploit this vulnerability, an attacker would need to run a specially crafted application against a server which provides Remote Desktop Service. The update addresses the vulnerability by correcting how Remote Desktop Service handles connection requests.
Overview
7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 6.7
EPSS Score
0.05418
probability of exploitation in the next 30 days
0.91668 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
4 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 7 for 32-bit Systems Service Pack 1 | 4580345 (Monthly Rollup) 4580387 (Security Only) |
Important | Denial of Service | Yes |
| Windows 7 for x64-based Systems Service Pack 1 | 4580345 (Monthly Rollup) 4580387 (Security Only) |
Important | Denial of Service | Yes |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 | 4580345 (Monthly Rollup) 4580387 (Security Only) |
Important | Denial of Service | Yes |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | 4580345 (Monthly Rollup) 4580387 (Security Only) |
Important | Denial of Service | Yes |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
4580345 (Monthly Rollup) 4580387 |
Monthly Rollup | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
VictorV (Tang Tianwen)
References
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