diff --git a/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.BeforeCommon.targets b/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.BeforeCommon.targets
index c354c46c2450..4550d18f5062 100644
--- a/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.BeforeCommon.targets
+++ b/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.BeforeCommon.targets
@@ -32,7 +32,7 @@ Copyright (c) .NET Foundation. All rights reserved.
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.DefaultAssemblyInfo.targets" Condition="'$(UsingNETSdkDefaults)' == 'true'"/>
 
   <!--
-    Apply the same default output paths as Microsoft.Common.targets now since we're running before them,
+    Apply these defaults from Microsoft.Common.CurrentVersion.targets now since we're running before them,
     but need to adjust them and/or make decisions in terms of them.
    -->
   <PropertyGroup>
diff --git a/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.BeforeCommonCrossTargeting.targets b/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.BeforeCommonCrossTargeting.targets
index 2fbae7d16b50..d46465076409 100644
--- a/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.BeforeCommonCrossTargeting.targets
+++ b/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.BeforeCommonCrossTargeting.targets
@@ -11,6 +11,16 @@ Copyright (c) .NET Foundation. All rights reserved.
 -->
 <Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
+  <!--
+    Apply these defaults from Microsoft.Common.CurrentVersion.targets now since we're running before them,
+    but need to adjust them and/or make decisions in terms of them.
+   -->
+  <PropertyGroup>
+    <Configuration Condition="'$(Configuration)'==''">Debug</Configuration>
+    <Platform Condition="'$(Platform)'==''">AnyCPU</Platform>
+    <PlatformName Condition="'$(PlatformName)' == ''">$(Platform)</PlatformName>
+  </PropertyGroup>
+  
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.DefaultAssemblyInfo.targets" />
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.DefaultOutputPaths.targets" />
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.Sdk.Workloads.CrossTargeting.targets" />
diff --git a/src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildACrossTargetedLibrary.cs b/src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildACrossTargetedLibrary.cs
index 0b83b03eb4d4..1777393595af 100644
--- a/src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildACrossTargetedLibrary.cs
+++ b/src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildACrossTargetedLibrary.cs
@@ -11,6 +11,7 @@
 using System.Linq;
 using FluentAssertions;
 using Xunit.Abstractions;
+using Microsoft.NET.TestFramework.ProjectConstruction;
 
 namespace Microsoft.NET.Build.Tests
 {
@@ -119,5 +120,37 @@ public void It_combines_inner_rids_for_restore(
             command.ExecuteWithoutRestore().Should().Pass();
             command.GetValues().Should().BeEquivalentTo(expectedCombination.Split(';'));
         }
+
+        [Fact]
+        public void OutputPathDoesNotHaveDuplicatedBackslashesInOuterBuild()
+        {
+            var testProject = new TestProject()
+            {
+                TargetFrameworks = $"{ToolsetInfo.CurrentTargetFramework};net7.0"
+            };
+
+            testProject.ProjectChanges.Add(xml =>
+            {
+                var target = """
+                <Target Name="GetOutputPath">
+                    <WriteLinesToFile File="$(MSBuildProjectDirectory)\OutputPathValue.txt"
+                                      Lines="$(OutputPath)"
+                                      Overwrite="true" />
+                </Target>
+                """;
+
+                xml.Root.Add(XElement.Parse(target));
+            });
+
+            var testAsset = _testAssetsManager.CreateTestProject(testProject);
+
+            new MSBuildCommand(testAsset, "GetOutputPath")
+                .Execute()
+                .Should()
+                .Pass();
+
+            string outputPathValue = File.ReadAllText(Path.Combine(testAsset.TestRoot, testProject.Name, "OutputPathValue.txt"));
+            outputPathValue.Trim().Should().NotContain("\\\\");
+        }
     }
 }