---
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
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.