CVE-2026-62913: Microsoft Exchange Server Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.
Other sources
Microsoft Exchange Server 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 15.02.2562.046Patch KB5121573 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.01.2507.072Patch KB5121576 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.02.1748.049Patch KB5121574 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.02.1544.044Patch KB5121575
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62913?
CVE-2026-62913 has a severity rating of 8.8, classified as high.
How do I fix CVE-2026-62913?
To remediate CVE-2026-62913, apply the latest security patch provided by Microsoft for Exchange Server.
What types of systems are affected by CVE-2026-62913?
CVE-2026-62913 affects Microsoft Exchange Server 2019, Microsoft Exchange Server Subscription Edition RTM, and Microsoft Exchange Server 2016.
What is the impact of CVE-2026-62913?
CVE-2026-62913 allows an authorized attacker to execute arbitrary code on the affected system remotely.
When was CVE-2026-62913 published?
CVE-2026-62913 was published on August 11, 2026.