CVE-2026-49172: Windows FTP Service Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows FTP Service allows an unauthorized attacker to execute code over a network.
Other sources
Windows FTP Service Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.8875Patch KB5101650 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33158Patch KB5099536 - Upgrade
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Fixed in 10.0.19044.7548Patch KB5099539 - Upgrade
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Fixed in 10.0.28000.2525Patch KB5101649 - Upgrade
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Fixed in 10.0.17763.9020Patch KB5099538 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.8875Patch KB5101650 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7376Patch KB5099414 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.7548Patch KB5099539 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9339Patch KB5099535 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5386Patch KB5099540
Event History
Frequently Asked Questions
What is the severity of CVE-2026-49172?
CVE-2026-49172 is classified as critical with a severity score of 9.8.
How do I fix CVE-2026-49172?
To fix CVE-2026-49172, apply the latest security updates provided by Microsoft for affected Windows versions.
What impact does CVE-2026-49172 have?
CVE-2026-49172 allows an unauthorized attacker to execute arbitrary code remotely on affected systems.
Which systems are affected by CVE-2026-49172?
CVE-2026-49172 affects Microsoft Windows 10, Windows 11, and several versions of Windows Server.
What type of vulnerability is CVE-2026-49172?
CVE-2026-49172 is a heap-based buffer overflow vulnerability in the Windows FTP Service.