{"id":"CVE-2026-77100","title":"MediaAgent contained a heap-based buffer overflow issue affecting service availability","summary":"MediaAgent contained a heap-based buffer overflow issue affecting service availability.  Software customers upgrade to resolved maintenance release. Update Commvault installation of MediaAgents and HyperScale.","severity":"high","cwe":["CWE-122"],"published":"2026-10-13","updated":"2026-10-14","sourceUpdated":"2026-10-14T16:04:11.750","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77100","references":[{"url":"https://documentation.commvault.com/securityadvisories/CV_2026_10_6.html","label":"050066fd-a2f9-4f32-ab5d-4c53f48bc333"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-13T15:33:40.083Z","vendor":"Commvault","product":"Commvault Cloud","affected":["cloud >= 11.46.0 <= 11.46.29","cloud >= 11.44.0 <= 11.44.24","cloud >= 11.40.0 <= 11.40.77","cloud >= 11.36.0 <= 11.36.126"],"cvss":8.7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-13T14:41:16.105259Z"},"cvssSource":"cna","epss":0.00316,"epssPercentile":0.24419,"slug":"CVE-2026-77100","body":"## Overview\n\nMediaAgent contained a heap-based buffer overflow issue affecting service availability.  Software customers upgrade to resolved maintenance release. Update Commvault installation of MediaAgents and HyperScale.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":220913,"id":"CVE-2026-77100","ts":1792026917436,"field":"cvss","old":null,"new":"8.7"},{"seq":220912,"id":"CVE-2026-77100","ts":1792026917436,"field":"severity","old":"none","new":"high"}]}