Russian forces continue limited offensive operations and infiltration missions in northern Sumy Oblast to establish a buffer zone along the border, with Russian claims of advances often exceeding assessments by groups such as the Institute for the Study of War. Ukrainian units have conducted counterattacks and strikes on Russian positions and logistics near the border, including in areas northwest and east of Sumy city, while holding key settlements. Recent reporting through late September 2026 shows Russian activity focused on small-scale probes and glide bomb strikes rather than large-scale mechanized pushes toward the city itself. Ukrainian operations on other fronts, including gains in Donetsk Oblast, have drawn Russian resources, and border fighting remains characterized by artillery, drones, and incremental infantry actions without verified deep territorial gains in Sumy.