Imagine a ballistic missile made by as close to as pure a League of Evil as it’s possible to get. Such a missile did not actually (to public knowledge) enter service, but it was worked on by several of the world’s most nefarious regimes. I speak of the Condor II/Badr-2000 (and undoubtedly many more names if it had spread) missile that was worked on by the Falklands-era Argentine junta, Saddam Hussein’s Iraq, and Egypt’s military regime (which has been credibly rumored to have continued development on other long-range missiles based on it in secret by itself.)
In Nuclear War Simulator, if I want a basic strategic missile for a rogue nation I’m giving plausible nuclear weapons, I give them Condors. As a final version of the Condor II was never explicitly built and tested, exact figures cannot be determined. However, range has been stated at 500-1200 kilometers and circular error probable from 500-50 meters, with even the larger number being acceptable for a nuclear warhead aimed at a city. The UNMOVIC report on Iraq’s missile program stated that the Badr-2000 had more modest goals: 1 phase with a range of 620 km and a CEP of 6.2 kilometers, followed by Phase 2 (620 km/620 meters) and Phase 3 (750 km/750 meters). The ballpark is narrow enough for me to use a “considerably longer than INF limits, and not too inaccurate” judgement in individual cases.
The payload was about 300-500 kilograms, and the missile around 80 centimeters in width. This would require a small warhead to work properly, and a light one to push the missile to its intended range. The first-gen Iraqi warhead would have been too big, but it would not have been an insurmountable problem given enough time (or, in my backgrounds, an AQ Khan-style nuclear network providing the materials/documentation to build a ‘standardized’ warhead small enough to fit into a Condor II).
To have every regional nuke-seeker get Condors is still a bit of a stretch. Historically, the foreign components and shaky finances of the developments gave opponents leverage that they used to squash it. But to have some of them slip through is not entirely implausible.