diff --git a/modules/exploits/windows/local/cve_2021_40449.rb b/modules/exploits/windows/local/cve_2021_40449.rb
index a5a82980c9c6..549fc90addd2 100644
--- a/modules/exploits/windows/local/cve_2021_40449.rb
+++ b/modules/exploits/windows/local/cve_2021_40449.rb
@@ -87,23 +87,23 @@ def check
     end
 
     # Build numbers taken from https://www.qualys.com/research/security-alerts/2021-10-12/microsoft/
-    if version.build_number == Msf::WindowsVersion::Win11_21H2 && version.build_number.revision_number.between?(0, 257)
+    if version.build_number == Msf::WindowsVersion::Win11_21H2 && version.revision_number.between?(0, 257)
       return CheckCode::Appears('Vulnerable Windows 11 build detected!')
-    elsif version.build_number == Msf::WindowsVersion::Server2022 && version.build_number.revision_number.between?(0, 287)
+    elsif version.build_number == Msf::WindowsVersion::Server2022 && version.revision_number.between?(0, 287)
       return CheckCode::Appears('Vulnerable Windows Server 2022 build detected!')
-    elsif version.build_number == Msf::WindowsVersion::Win10_21H2 && version.build_number.revision_number.between?(0, 1318)
+    elsif version.build_number == Msf::WindowsVersion::Win10_21H2 && version.revision_number.between?(0, 1318)
       return CheckCode::Appears('Vulnerable Windows 10 21H2 build detected!')
-    elsif version.build_number == Msf::WindowsVersion::Win10_21H1 && version.build_number.revision_number.between?(0, 1287)
+    elsif version.build_number == Msf::WindowsVersion::Win10_21H1 && version.revision_number.between?(0, 1287)
       return CheckCode::Appears('Vulnerable Windows 10 21H1 build detected!')
-    elsif version.build_number == Msf::WindowsVersion::Win10_20H2 && version.build_number.revision_number.between?(0, 1287)
+    elsif version.build_number == Msf::WindowsVersion::Win10_20H2 && version.revision_number.between?(0, 1287)
       return CheckCode::Appears('Vulnerable Windows 10 20H2 build detected!')
-    elsif version.build_number == Msf::WindowsVersion::Win10_2004 && version.build_number.revision_number.between?(0, 1287)
+    elsif version.build_number == Msf::WindowsVersion::Win10_2004 && version.revision_number.between?(0, 1287)
       return CheckCode::Appears('Vulnerable Windows 10 20H1 build detected!')
-    elsif version.build_number == Msf::WindowsVersion::Win10_1909 && version.build_number.revision_number.between?(0, 1853)
+    elsif version.build_number == Msf::WindowsVersion::Win10_1909 && version.revision_number.between?(0, 1853)
       return CheckCode::Appears('Vulnerable Windows 10 v1909 build detected!')
     elsif version.build_number == Msf::WindowsVersion::Win10_1903
       return CheckCode::Appears('Vulnerable Windows 10 v1903 build detected!')
-    elsif version.build_number == Msf::WindowsVersion::Win10_1809 && version.build_number.revision_number.between?(0, 2236)
+    elsif version.build_number == Msf::WindowsVersion::Win10_1809 && version.revision_number.between?(0, 2236)
       return CheckCode::Appears('Vulnerable Windows 10 v1809 build detected!')
     elsif version.build_number == Msf::WindowsVersion::Win10_1803
       return CheckCode::Appears('Vulnerable Windows 10 v1803 build detected!')
@@ -111,11 +111,11 @@ def check
       return CheckCode::Appears('Vulnerable Windows 10 v1709 build detected!')
     elsif version.build_number == Msf::WindowsVersion::Win10_1703
       return CheckCode::Appears('Vulnerable Windows 10 v1703 build detected!')
-    elsif version.build_number == Msf::WindowsVersion::Win10_1607 && version.build_number.revision_number.between?(0, 4703)
+    elsif version.build_number == Msf::WindowsVersion::Win10_1607 && version.revision_number.between?(0, 4703)
       return CheckCode::Appears('Vulnerable Windows 10 v1607 build detected!')
     elsif version.build_number == Msf::WindowsVersion::Win10_1511
       return CheckCode::Appears('Vulnerable Windows 10 v1511 build detected!')
-    elsif version.build_number == Msf::WindowsVersion::Win10_1507 && version.build_number.revision_number.between?(0, 19085)
+    elsif version.build_number == Msf::WindowsVersion::Win10_1507 && version.revision_number.between?(0, 19085)
       return CheckCode::Appears('Vulnerable Windows 10 v1507 build detected!')
     elsif version.build_number == Msf::WindowsVersion::Win81 # Includes Server 2012 R2
       return CheckCode::Detected('Windows 8.1/Windows Server 2012 R2 build detected!')