diff --git a/eng/Versions.props b/eng/Versions.props
index d22274995382..b2dba27ca2ef 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -198,8 +198,7 @@
     <MicrosoftExtensionsDiagnosticAdapterVersion>5.0.0-preview.3.20215.2</MicrosoftExtensionsDiagnosticAdapterVersion>
     <!-- Build tool dependencies -->
     <MicrosoftVSSDKBuildToolsVersion>15.9.3032</MicrosoftVSSDKBuildToolsVersion>
-    <!-- Manually updated version from 6.0.0 to address CVE-2021-43877 -->
-    <RepoTasksSystemSecurityCryptographyXmlVersion>6.0.1</RepoTasksSystemSecurityCryptographyXmlVersion>
+    <RepoTasksSystemSecurityCryptographyXmlVersion>8.0.0</RepoTasksSystemSecurityCryptographyXmlVersion>
     <!-- Stable dotnet/corefx packages no longer updated for .NET Core 3 -->
     <MicrosoftCSharpVersion>4.7.0</MicrosoftCSharpVersion>
     <MicrosoftWin32RegistryVersion>5.0.0</MicrosoftWin32RegistryVersion>
diff --git a/eng/tools/RepoTasks/RepoTasks.csproj b/eng/tools/RepoTasks/RepoTasks.csproj
index e018dce1ef3f..f505e9389c65 100644
--- a/eng/tools/RepoTasks/RepoTasks.csproj
+++ b/eng/tools/RepoTasks/RepoTasks.csproj
@@ -26,7 +26,7 @@
     <PackageReference Include="Microsoft.Build.Framework" Version="$(MicrosoftBuildFrameworkVersion)" />
     <PackageReference Include="Microsoft.Build.Tasks.Core" Version="$(MicrosoftBuildTasksCoreVersion)" />
     <PackageReference Include="Microsoft.Build.Utilities.Core" Version="$(MicrosoftBuildUtilitiesCoreVersion)" />
-    <!-- Manually updated version from 6.0.0 to address CVE-2021-43877 -->
+    <!-- Manually updated version from 6.0.0 to address CVE-2023-29331 -->
     <PackageReference Include="System.Security.Cryptography.Xml" Version="$(RepoTasksSystemSecurityCryptographyXmlVersion)" />
   </ItemGroup>