CVE-2026-61353: Windows Telephony Service Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Telephony Service allows an authorized attacker to elevate privileges locally.
Other sources
Windows Telephony Service Elevation of Privilege 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 10.0.14393.9418Patch KB5120418 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.2704Patch KB5121000 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7517Patch KB5120240 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.7663Patch KB5120249 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9115Patch KB5120238 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7663Patch KB5120249 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26280Patch KB5120386 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23338Patch KB5120385 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9168Fixed in 10.0.26200.9106Patch KB5120994 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9168Fixed in 10.0.26200.9106Patch KB5120994 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9168Fixed in 10.0.26100.9106Patch KB5120994
Event History
Frequently Asked Questions
What is the severity of CVE-2026-61353?
CVE-2026-61353 has a high severity rating of 7.8.
How can I fix CVE-2026-61353?
Patching your Microsoft Windows systems with the latest updates will mitigate the CVE-2026-61353 vulnerability.
What type of vulnerability is CVE-2026-61353?
CVE-2026-61353 is classified as a heap-based buffer overflow vulnerability in the Windows Telephony Service.
Which operating systems are affected by CVE-2026-61353?
CVE-2026-61353 affects various versions of Microsoft Windows including Windows 10, Windows 11, and several Windows Server editions.
What kind of attack does CVE-2026-61353 enable?
CVE-2026-61353 allows an authorized attacker to perform a local elevation of privilege attack.