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Vulnerability record · CVE-2026-78463 · published 8 September 2026

CVE-2026-78463: Microsoft remote desktop client code injection vulnerability

Microsoft · Remote Desktop Client

Improper control of generation of code ('code injection') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

8.8 CVSS 3.1 High EPSS 0.86% · top 43.1% CWE-94 · Code injection
8.8CVSS 3.1 base score
0.86%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
22 Sep 2026Last modified by NVD

Description

Improper control of generation of code ('code injection') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78463 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2026-80074Microsoft remote desktop client heap-based buffer overflow vulnerabilityHeap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.EPSS 0.82%8.8CVE-2026-80077Microsoft remote desktop client heap-based buffer overflow vulnerabilityHeap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.EPSS 0.82%8.8CVE-2026-42985Microsoft remote desktop client use after free vulnerabilityUse after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.EPSS 0.82%8.8CVE-2026-32157Microsoft remote desktop client use after free vulnerabilityUse after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.EPSS 0.82%8.8CVE-2025-58718Microsoft remote desktop client use after free vulnerabilityUse after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.EPSS 0.60%8.8CVE-2025-48817Microsoft remote desktop client relative path traversal vulnerabilityRelative path traversal in Remote Desktop Client allows an unauthorized attacker to execute code over a network.EPSS 0.96%8.8CVE-2025-26645Microsoft windows 10 1507 relative path traversal vulnerabilityRelative path traversal in Remote Desktop Client allows an unauthorized attacker to execute code over a network.EPSS 3.1%8.8CVE-2024-38131Microsoft remote desktop client vulnerabilityClipboard Virtual Channel Extension Remote Code Execution VulnerabilityEPSS 1.3%

Source: NIST National Vulnerability Database (record CVE-2026-78463), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.