<a href="//commons.wikimedia.org/wiki/CIA_World_Factbook" title="CIA World Factbook">CIA World Factbook</a> Political World Map. January 2015 is the latest vector version available of this file. (The <a rel="nofollow" class="external text" href="https://www.cia.gov/library/publications/the-world-factbook/graphics/ref_maps/political/pdf/world.pdf">October 2016 PDF</a> contains a bitmap version, not vector. And February 2021 PDF version is partially vector, and partially bitmap.)
CIA World Factbook
This image is expected to always be the most recent one. Feel free to update it when needed.
<a rel="nofollow" class="external text" href="https://www.cia.gov/library/publications/the-world-factbook/docs/refmaps.html">CIA - The World Factbook -- Reference Maps</a>