Ukraine's military intelligence agency said Monday that Russia has begun using a new variant of its Geran-5 attack drone, designated the K5-K, which it described as a small-sized cruise missile capable of higher speeds and altitudes than its predecessors, and that one recovered munition was armed with a thermobaric warhead.
Kyiv's GUR intelligence agency reported that Russia began using the K5-K to attack Ukrainian cities several weeks ago, and its experts found a nearly intact example in a field. The agency said the weapon's aerodynamic and technical characteristics mean it “can already be classified as a small-sized cruise missile.”
The K5-K, like the earlier Geran-4 and Geran-5 drones, is powered by a mini turbojet engine. According to the GUR, its airframe is slightly smaller than the Geran-5, but its fuselage has been improved for greater speed and altitude. The agency said the missile can reach an altitude of nearly 20,000 feet, up from 16,000 feet for the Geran-5, and cruise at speeds over 280 mph, with the ability to fly faster than 600 mph during certain maneuvers. Its range remains about 620 miles and its warhead size 200 pounds.
The recovered K5-K, the GUR said, was armed with a TBCH-90 thermobaric warhead. These munitions, also known as vacuum bombs, disperse an aerosol cloud of explosive material and ignite it, creating a large fireball and a high-temperature blast wave while drawing out surrounding oxygen. Russia has armed some earlier drones with thermobaric warheads, and Ukrainian first responders and air defenders have characterized them as a serious issue.
The GUR said hundreds of foreign-made electronic components were found inside the weapon, echoing past findings that highlight the challenge of restricting Russia's access to foreign components. Neither Russia's defense ministry nor its US embassy responded to a request for comment on the GUR's findings.
The K5-K's emergence comes as Russia has invested heavily in jet-powered drones in recent months, building air bases to support their launch and attacking Ukraine with thousands of them since June. Conflict analysts at the Institute for the Study of War, a US think tank, said in an October assessment that Russian forces “began integrating inexpensive, highly maneuverable quasi-cruise missiles into their missile strike packages in mid-2026 — marking a concerning shift toward low-cost, cruise-missile-like weapons that can strain Ukraine's scarce air defense stocks.” The analysts said quasi-cruise missiles such as the Banderol S8000 have larger warheads and fly faster than even the Geran-5. The Geran-5 and Banderol S8000 are estimated to cost up to $100,000, much less than a $2 million Kh-101 cruise missile, the ISW said. The analysts said Russian forces likely aim to use quasi-cruise missiles to augment the effects of ballistic-missile and jet-powered-drone combined strikes, which have been exploiting and exacerbating Ukrainian interceptor-missile shortages.
Analysis
Why This Matters
- The K5-K blurs the line between drones and cruise missiles, giving Russia a cheaper, harder-to-intercept weapon that can saturate Ukraine's air defenses.
- Its thermobaric warhead makes it particularly destructive in urban or enclosed spaces, adding to the threat posed by existing drone and missile strikes.
- The reliance on foreign-made components, despite sanctions, underscores the difficulty of cutting Russia's access to advanced electronics for weapons production.
Background
Russia has been developing and deploying jet-powered drones like the Geran-4 and Geran-5 since mid-2026, expanding air bases to support their use. These weapons, collectively termed "quasi-cruise missiles" by analysts, are far cheaper than traditional cruise missiles such as the Kh-101 but offer increased maneuverability and speed. Ukraine has reported finding foreign components in Russian munitions before, highlighting persistent supply-chain challenges.
Key Perspectives
GUR (Ukraine's military intelligence agency): Says the K5-K can already be classified as a small-sized cruise missile due to its improved speed, altitude, and aerodynamic characteristics.
Institute for the Study of War (US think tank): Assesses that quasi-cruise missiles like the K5-K and Banderol S8000 are designed to strain Ukraine's air defense stocks and augment the effects of combined ballistic missile and jet-powered drone strikes.
What to Watch
- How frequently Russia integrates the K5-K into its strike packages and whether production scales up.
- Ukraine's ability to adapt its air defense tactics or develop faster interceptors, as its defense industry is reportedly racing to do.
- Further reports of foreign components in the K5-K and any renewed efforts by Ukraine's allies to tighten export controls.
Checked
12 claims in this story checked against 1 source: 12 supported.
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- SupportedRussia has begun deploying the K5-K against Ukraine as a new cruise missile, according to Kyiv intelligence.All Content from Business Insider: “Russia has begun using a new missile, the K5-K, which is based on its Geran-5 jet-powered drone.”
- SupportedUkraine says the modified Geran-5 can fly faster and higher than its predecessors.All Content from Business Insider: “Ukrainian intelligence said the K5-K is smaller than its predecessor, but can fly faster and higher.”
- SupportedA recovered K5-K was armed with a thermobaric warhead.All Content from Business Insider: “One of the missiles, which was found nearly intact, was armed with a deadly thermobaric warhead.”
- SupportedGUR said Russia began using the K5-K to attack Ukrainian cities several weeks ago.All Content from Business Insider: “Several weeks ago, Russia began using a variant of its Geran-5 drone known as the K5-K to attack Ukrainian cities, the GUR, Kyiv's military intelligence agency, said”
- SupportedGUR said the K5-K “can already be classified as a small-sized cruise missile.”All Content from Business Insider: “Considering the K5-K's aerodynamic and technical characteristics, it "can already be classified as a small-sized cruise missile," the agency said.”
- SupportedGUR said the K5-K can reach nearly 20,000 feet, compared with 16,000 feet for the Geran-5.All Content from Business Insider: “The K5-K can reach an altitude of nearly 20,000 feet, up from 16,000 feet”
- SupportedGUR said the K5-K cruises at over 280 mph and can exceed 600 mph during certain maneuvers.All Content from Business Insider: “and cruise at speeds over 280 mph, though it can fly faster than 600 mph during certain maneuvers, the GUR said.”
- SupportedThe K5-K has a range of about 620 miles and a 200-pound warhead.All Content from Business Insider: “The missile has the same range and warhead size — 620 miles and 200 pounds, respectively — as its predecessor.”
- SupportedGUR said it found hundreds of foreign-made electronic components in the munition.All Content from Business Insider: “The GUR noted that Ukraine discovered hundreds of foreign-made electronic components inside the munition”
- SupportedISW analysts wrote that Russian forces began integrating inexpensive, highly maneuverable quasi-cruise missiles into strike packages in mid-2026, calling it a concerning shift that could strain Ukraine's air-defence stocks.All Content from Business Insider: “"Russian forces began integrating inexpensive, highly maneuverable quasi-cruise missiles into their missile strike packages in mid-2026 — marking a concerning shift toward low-cost, cruise-missile-like weapons that can strain Ukraine's scarce air defense stocks,"”
- SupportedISW estimated the Geran-5 and Banderol S8000 can cost up to $100,000 each, compared with $2 million for a Kh-101.All Content from Business Insider: “Both of these weapons are estimated to cost up to $100,000 — much cheaper than a $2 million Kh-101 cruise missile .”
- SupportedISW analysts said quasi-cruise missiles such as the Banderol S8000 have larger warheads and fly faster than the Geran-5.All Content from Business Insider: “ISW's analysts said that quasi-cruise missiles like the Banderol S8000 have larger warheads and fly at greater speeds than even the fastest jet-powered drone, the Geran-5.”