Direct proof of use
Qaher-M2 use in the 2014 Yemen Civil War is documented in specialist missile reporting, Houthi-aligned claims, Saudi interception reporting, and humanitarian monitoring of missile attacks into Saudi Arabia. CSIS describes Qaher-M2 as the improved member of the Qaher line, a Houthi conversion of Yemeni V-755 surface-to-air missile stocks into unguided land-attack rockets, and reports that the Houthis first fired the upgraded version in March 2017.
The Washington Institute identifies a March 28, 2017 attack as involving Qaher-M2 missiles with a claimed 400 km range and 350 kg warhead, and says the same attack used a multi-missile salvo in an apparent attempt to overwhelm Patriot batteries at Khamis Mushait. Later reporting records Qaher-M2 or Qaher-2M launches toward Najran and Abha during the continuing cross-border missile campaign.
Sources: The Missile War in Yemen, Countering Iran's Missile Proliferation in Yemen, Saudi Air Defenses Intercept Houthi Missile Targeting Najran, A peek inside Houthi Rebel's recent missile strikes in Saudi Arabia
Narrative
In Yemen-war service, the Qaher-M2 was a Houthi-aligned long-range strike weapon rather than an air-defense missile. The system reused SA-2/S-75-family missile bodies that had limited value against coalition aircraft, converting them into surface-to-surface weapons for attacks on Saudi border cities, military sites, and airports.
The documented operator was the Houthi-aligned Yemeni Army and Popular Committees or Houthi-Saleh/Houthi forces, depending on the source and date. The targets named in public reporting included King Khalid Air Base near Khamis Mushait, military sites around Najran, and Abha Regional Airport in Asir province. Some reports describe Saudi Patriot interceptions and debris effects, while Houthi-aligned outlets claimed successful impacts.
The evidence is strongest for fielding and launch claims, not for independent battle-damage assessment from each missile. CSIS and the Washington Institute support the Qaher-M2 lineage, first reported use, and cross-border role; CSIS Missile Threat and Al Jazeera document Najran launch and interception reporting; FDD and Human Rights Watch connect Qaher-2M to the March 2018 Abha airport attack. The Houthi-aligned SABA account is useful for the movement's own development and target claims, but it is treated here as a party claim rather than independent confirmation of impact.
Sources: The Missile War in Yemen, Countering Iran's Missile Proliferation in Yemen, Saudi Air Defenses Intercept Houthi Missile Targeting Najran, Saudis intercept Houthi missile near Yemen border, A peek inside Houthi Rebel's recent missile strikes in Saudi Arabia, Saudi Arabia/Yemen: Houthi Missile Attacks Unlawful, Yemen's ballistic missiles arsenal designed to deter enemy attack