diff --git a/Directory.Packages.props b/Directory.Packages.props
index 71f1681e..5b95a7e1 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -40,6 +40,17 @@
     <PackageVersion Include="Microsoft.AspNetCore.DataProtection.EntityFrameworkCore" Version="10.0.7" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.0" />
     <PackageVersion Include="Microsoft.AspNetCore.SignalR.Client" Version="10.0.0" />
+    <!--
+      Surgical transitive pin #4. GHSA-334f-vvp4-7g6p (CVE-2026-70159, NU1903 high) flags
+      Microsoft.AspNetCore.SignalR.Common 10.0.0..10.0.12, which SignalR.Client 10.0.0 pulls in via
+      SignalR.Client.Core. 10.0.13 is the first fixed version, pinned by direct PackageReference in
+      AdminUI (the one project that references SignalR.Client). Bumping SignalR.Client itself to
+      10.0.13 was tried and rejected: SignalR.Client.Core 10.0.13 floors Microsoft.Extensions.Logging /
+      DependencyInjection at 10.0.13, which the AdminUI shared framework absorbs but non-Web consumers
+      downstream (OpcUaServer.IntegrationTests, which references Logging.Abstractions 10.0.7 directly)
+      do not, producing an NU1605 downgrade.
+    -->
+    <PackageVersion Include="Microsoft.AspNetCore.SignalR.Common" Version="10.0.13" />
     <PackageVersion Include="Microsoft.AspNetCore.SignalR.Core" Version="1.2.0" />
     <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="10.0.7" />
     <!--
@@ -149,8 +160,28 @@
       Microsoft.Extensions.* and, through the EFCore adapter, Microsoft.EntityFrameworkCore at
       10.0.10, forcing a family-wide servicing bump (NU1605 downgrade cascade) that deserves its own
       reviewed change.
+
+      2026-10-22: raised 10.0.10 -> 10.0.13. Three more NU1903 advisories (GHSA-7hqp-7c5m-4vq6,
+      GHSA-c399-9853-6jmj, GHSA-r955-8q5j-3h83; vulnerable <= 10.0.12) landed against 10.0.10, again
+      red only on a fresh restore (~67 projects). 10.0.13 is the first fixed version. Same pin site,
+      same reasoning against the DataProtection parent bump.
     -->
-    <PackageVersion Include="System.Security.Cryptography.Xml" Version="10.0.10" />
+    <PackageVersion Include="System.Security.Cryptography.Xml" Version="10.0.13" />
+    <!--
+      Surgical transitive pin #3. GHSA-846f-f764-76mx (NU1903 high) + GHSA-2fmv-rv2c-59x7 (NU1902
+      moderate) flag System.Security.Cryptography.Pkcs <= 10.0.12 and 9.0.0..9.0.20. Two chains bring
+      it in, both entering at Core.Configuration:
+        - System.Security.Cryptography.Xml 10.0.x -> Pkcs 10.0.x (same version as Xml), and
+        - Microsoft.EntityFrameworkCore.SqlServer 10.0.7 -> Microsoft.Data.SqlClient 6.1.1 -> Pkcs 9.0.4.
+      In Web-SDK consumers (AdminUI, ControlPlane, Host, Security, ...) the ASP.NET Core shared
+      framework prunes the Xml chain, so the SqlClient 9.0.4 floor is what resolves there (~9
+      projects); everywhere else the Xml chain's 10.0.10 won (~67 projects). Raising the Xml pin alone
+      only fixes the second group, so Pkcs is pinned explicitly at 10.0.13 (first fixed 10.x) by a
+      direct PackageReference in Core.Configuration. Its net10.0 dependency group is empty, so the pin
+      floors nothing else. Bumping Microsoft.Data.SqlClient / EFCore.SqlServer instead would be the
+      family-wide servicing bump the Xml note above declines.
+    -->
+    <PackageVersion Include="System.Security.Cryptography.Pkcs" Version="10.0.13" />
     <PackageVersion Include="System.CommandLine" Version="2.0.5" />
     <PackageVersion Include="System.Data.SqlClient" Version="4.9.0" />
     <PackageVersion Include="System.IdentityModel.Tokens.Jwt" Version="8.11.0" />
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/ZB.MOM.WW.OtOpcUa.Configuration.csproj b/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/ZB.MOM.WW.OtOpcUa.Configuration.csproj
index 9d4414ed..bb99850d 100644
--- a/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/ZB.MOM.WW.OtOpcUa.Configuration.csproj
+++ b/src/Core/ZB.MOM.WW.OtOpcUa.Configuration/ZB.MOM.WW.OtOpcUa.Configuration.csproj
@@ -28,6 +28,10 @@
              Directory.Packages.props. This is the one project where the DataProtection chain
              enters the repo; every other consumer reaches it through a ProjectReference here. -->
         <PackageReference Include="System.Security.Cryptography.Xml"/>
+        <!-- Surgical transitive pin — see the System.Security.Cryptography.Pkcs block in
+             Directory.Packages.props. Microsoft.Data.SqlClient (via EFCore.SqlServer) enters here
+             too and pulls a vulnerable Pkcs 9.0.4 wherever the shared framework prunes the Xml chain. -->
+        <PackageReference Include="System.Security.Cryptography.Pkcs"/>
         <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions"/>
         <PackageReference Include="Microsoft.Extensions.Logging.Abstractions"/>
         <PackageReference Include="Polly.Core"/>
diff --git a/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Sql.Dialect/ZB.MOM.WW.OtOpcUa.Driver.Sql.Dialect.csproj b/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Sql.Dialect/ZB.MOM.WW.OtOpcUa.Driver.Sql.Dialect.csproj
index bf77262f..20aaa560 100644
--- a/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Sql.Dialect/ZB.MOM.WW.OtOpcUa.Driver.Sql.Dialect.csproj
+++ b/src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Sql.Dialect/ZB.MOM.WW.OtOpcUa.Driver.Sql.Dialect.csproj
@@ -26,6 +26,10 @@
          provider's DbProviderFactory (NpgsqlFactory / OracleClientFactory); both packages are fully
          managed ADO.NET drivers, so adding them costs no native client install anywhere. -->
     <PackageReference Include="Microsoft.Data.SqlClient" />
+    <!-- Surgical transitive pin — see the System.Security.Cryptography.Pkcs block in
+         Directory.Packages.props. SqlClient 6.1.1 pulls a vulnerable Pkcs 9.0.4; this is the
+         second place the SqlClient chain enters the repo (Core.Configuration is the first). -->
+    <PackageReference Include="System.Security.Cryptography.Pkcs" />
     <PackageReference Include="Npgsql" />
     <PackageReference Include="Oracle.ManagedDataAccess.Core" />
   </ItemGroup>
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ZB.MOM.WW.OtOpcUa.AdminUI.csproj b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ZB.MOM.WW.OtOpcUa.AdminUI.csproj
index e014d2bf..5e79799d 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ZB.MOM.WW.OtOpcUa.AdminUI.csproj
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ZB.MOM.WW.OtOpcUa.AdminUI.csproj
@@ -9,6 +9,12 @@
     <ItemGroup>
         <FrameworkReference Include="Microsoft.AspNetCore.App"/>
         <PackageReference Include="Microsoft.AspNetCore.SignalR.Client"/>
+        <!-- Surgical transitive pin — see the Microsoft.AspNetCore.SignalR.Common block in
+             Directory.Packages.props (GHSA-334f-vvp4-7g6p on SignalR.Common 10.0.0). Inside AdminUI
+             the shared framework already supplies it (hence NU1510), but the PackageReference flows
+             to the non-Web consumers (Host.Tests, AdminUI.Tests, OpcUaServer.IntegrationTests) where
+             SignalR.Client 10.0.0 would otherwise resolve the vulnerable 10.0.0. -->
+        <PackageReference Include="Microsoft.AspNetCore.SignalR.Common" NoWarn="NU1510"/>
         <PackageReference Include="ZB.MOM.WW.Theme"/>
         <PackageReference Include="ZB.MOM.WW.Secrets.Ui"/>
     </ItemGroup>