CVE-2026-77101: CWE-121: Stack-based Buffer Overflow in Commvault Commvault Cloud
CommServe contained a stack-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update CommServe.
AI Analysis
Technical Summary
This vulnerability is a stack-based buffer overflow in the CommServe component of Commvault Commvault Cloud. It can be triggered remotely without authentication or user interaction, leading to a high impact on service availability. The CVE description advises customers to upgrade to a maintenance release that resolves the issue. No official remediation level or patch links are provided in the source data, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation can cause a denial of service by corrupting the stack, impacting the availability of the CommServe service. There is no indication of confidentiality or integrity impact. The vulnerability is remotely exploitable without privileges or user interaction.
Mitigation Recommendations
The vendor advises upgrading to a resolved maintenance release to address this vulnerability. However, no specific patch or fixed version details are provided in the available data. Customers should consult the official Commvault advisories for the exact fixed versions and apply updates accordingly. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-77101: CWE-121: Stack-based Buffer Overflow in Commvault Commvault Cloud
Description
CommServe contained a stack-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update CommServe.
CVSS v4.0
Score 8.7high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a stack-based buffer overflow in the CommServe component of Commvault Commvault Cloud. It can be triggered remotely without authentication or user interaction, leading to a high impact on service availability. The CVE description advises customers to upgrade to a maintenance release that resolves the issue. No official remediation level or patch links are provided in the source data, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation can cause a denial of service by corrupting the stack, impacting the availability of the CommServe service. There is no indication of confidentiality or integrity impact. The vulnerability is remotely exploitable without privileges or user interaction.
Mitigation Recommendations
The vendor advises upgrading to a resolved maintenance release to address this vulnerability. However, no specific patch or fixed version details are provided in the available data. Customers should consult the official Commvault advisories for the exact fixed versions and apply updates accordingly. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Commvault
- Date Reserved
- 2026-08-20T10:57:52.110Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa00199acd9273b49a6cf1a
Added to database: 09/08/2026, 12:37:45 UTC
Last enriched: 09/08/2026, 12:53:04 UTC
Last updated: 09/08/2026, 15:38:20 UTC
Views: 7
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