TY CONF TI MODELING THE DEGRADATION OF INFORMATION SYSTEMS DUE TO PROLONGED ABSENCE OF SECURITY UPDATES KW CVE KW stochastic model KW Markov chains KW graph analysis KW cascade effects KW patch fatigue KW birth-death KW Monte Carlo KW NIST NVD KW vulnerability debt JO MODELING INFORMATION SYSTEMS AND TECHNOLOGIES – 2026 AU Alekseev, V.R. AU Buchnev, S.O. AU Getmantsev, D.D. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov