Remote code execution via undisclosed code injection
Published Sep 8, 2026 · Updated Sep 9, 2026
Code injection in Microsoft Remote Desktop client for Windows Desktop before 1.2.7279.0 allows remote attackers to execute code. Microsoft has not published the affected code path or the operation that converts network-delivered input into executable code. Exploitation requires user interaction and network reachability; successful exploitation runs attacker-controlled code in the client's security context.
Summary
What happened
Code injection in Microsoft Remote Desktop client for Windows Desktop before 1.2.7279.0 allows remote attackers to execute code. Microsoft has not published the affected code path or the operation that converts network-delivered input into executable code. Exploitation requires user interaction and network reachability; successful exploitation runs attacker-controlled code in the client's security context.
The record
- CVE
- CVE-2026-78463
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Remote Desktop client for Windows Desktop
- Classifications
- CWE-94, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.2.0.0 <1.2.7279.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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