diff --git a/pkgtool.pm b/pkgtool.pm
index 8ae1842..7509514 100644
--- a/pkgtool.pm
+++ b/pkgtool.pm
@@ -935,6 +935,8 @@ sub check_cfg_patchdef ($$)
 	}
 	elsif ($style eq 'msp') {
 	}
+	elsif ($style eq 'cab') {
+	}
 	else {
 		print_log('pkg', ERROR, 'Unknown patch style at %s', $label.': '.$style);
 		return 0;
@@ -2391,7 +2393,7 @@ sub install_patch ($$$$$$$)
 	$$vars{patchsuffix} = defined $$patchdef{suffix} ? $$patchdef{suffix} : '';
 
 	my $style = $$patchdef{style};
-	$$vars{patchext} = $style eq 'exe' ? '.exe' : $style eq 'msu' ? '.msu' : $style eq 'msp' ? '.msp' : '';
+	$$vars{patchext} = $style eq 'exe' ? '.exe' : $style eq 'msu' ? '.msu' : $style eq 'msp' ? '.msp' : $style eq 'cab' ? '.cab' : '';
 
 	my $sourcespec = $$patchdef{'source-file'};
 	$sourcespec = '%patchprefix%%patchkbname%%patchnum%%patchextra%%patchedition%%patcharch%%patchsuffix%%patchext%' unless defined $sourcespec;
@@ -2435,6 +2437,18 @@ sub install_patch ($$$$$$$)
 			$exitcode = -1;
 		}
 	}
+	elsif ($style eq 'cab') {
+		my $exename = substitute_variables($vars, '%systemroot%/System32/dism.exe', 1, undef, 'pkg');
+		my $paramlist = ['/online', '/add-package', '/packagepath:'.$sourcefile];
+		push @$paramlist, @{$$patchdef{parameters}} if defined $$patchdef{parameters};
+		if (-f $sourcefile) {
+			($error, $exitcode) = run_exe('pkg', $db, $vars, undef, $exename, $paramlist, 0);
+		}
+		else {
+			$error = sprintf('Cannot find CAB file %s: %s', $sourcefile, $!);
+			$exitcode = -1;
+		}
+	}
 	if (defined $error) {
 		if (defined $exitcode && $exitcode == 194) {
 			print_log('pkg', INFO, 'Ignoring patch %s installation exit code: %s', $kb, $exitcode);