diff --git a/pkgs/applications/networking/mailreaders/thunderbird-bin/68.nix b/pkgs/applications/networking/mailreaders/thunderbird-bin/68.nix
index be937ab588d..47af8a20243 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird-bin/68.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird-bin/68.nix
@@ -179,5 +179,6 @@ stdenv.mkDerivation {
     };
     maintainers = with stdenv.lib.maintainers; [ ];
     platforms = platforms.linux;
+    knownVulnerabilities = [ "Support ended around Semptember 2020." ];
   };
 }
diff --git a/pkgs/applications/networking/mailreaders/thunderbird/68.nix b/pkgs/applications/networking/mailreaders/thunderbird/68.nix
index 707b35dd499..ee5b7c5e17b 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/68.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/68.nix
@@ -337,5 +337,6 @@ stdenv.mkDerivation rec {
     ];
     platforms = platforms.linux;
     license = licenses.mpl20;
+    knownVulnerabilities = [ "Support ended around Semptember 2020." ];
   };
 }