---
id: CVE-2026-77101
title: >-
  CommServe contained a stack-based buffer overflow issue affecting service
  availability
summary: >-
  CommServe contained a stack-based buffer overflow issue affecting service
  availability. Software customers upgrade to resolved maintenance release.
  Update CommServe.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-121
vendor: commvault
product: commvault
affected:
  - 'commvault >= 11.36.0, < 11.36.123'
  - 'commvault >= 11.40.0, < 11.40.72'
  - 'commvault >= 11.44.0, < 11.44.20'
  - 'commvault >= 11.46.0, < 11.46.20'
patched:
  - commvault 11.46.20
published: '2026-09-08'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T15:55:36.430'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77101'
references:
  - url: 'https://documentation.commvault.com/securityadvisories/CV_2026_08_3.html'
    label: 050066fd-a2f9-4f32-ab5d-4c53f48bc333
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-08T13:24:30.911215Z'
scores:
  nvd: 7.5
  cna: 8.7
ingestedAt: '2026-09-08T15:33:26.984Z'
epss: 0.00458
epssPercentile: 0.36962
---

## Overview

CommServe contained a stack-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update CommServe.

## Affected

- `commvault >= 11.36.0, < 11.36.123`
- `commvault >= 11.40.0, < 11.40.72`
- `commvault >= 11.44.0, < 11.44.20`
- `commvault >= 11.46.0, < 11.46.20`

## Remediation

Upgrade past the affected range:

- `commvault 11.46.20`