It was discovered that Vim did not properly handle backticks in tag filenames. An attacker could possibly use this issue to execute arbitrary commands.
2:7.4.052-1ubuntu3.1+esm272:7.4.1689-3ubuntu1.5+esm332:8.0.1453-1ubuntu1.13+esm182:8.1.2269-1ubuntu5.32+esm6