CVE-2026-77102

Analyzed Analyzed - Analysis Complete

Heap Overflow in CommServe Service

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Commvault

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-09

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-77102

Affected Vendors & Products

Vendor	Product	Version / Range
commvault	commvault	From 11.36.0 (inc) to 11.36.123 (exc)
commvault	commvault	From 11.40.0 (inc) to 11.40.72 (exc)
commvault	commvault	From 11.44.0 (inc) to 11.44.20 (exc)
commvault	commvault	From 11.46.0 (inc) to 11.46.20 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

CommServe software versions 11.46.0 to 11.46.19, 11.44.0 to 11.44.19, 11.40.0 to 11.40.71, and 11.36.0 to 11.36.122 for Linux and Windows platforms contain a heap-based buffer overflow vulnerability. This flaw can cause a denial of service (DoS) condition, disrupting service availability.

Detection Guidance

Detection involves checking CommServe software versions. Verify installed versions against affected ranges (11.46.0-11.46.19, 11.44.0-11.44.19, 11.40.0-11.40.71, 11.36.0-11.36.122). Use CommCell Console or Command Center to inspect server versions. No specific commands are provided in the advisory.

Impact Analysis

The vulnerability can lead to service outages, making CommServe unavailable. This disrupts operations dependent on the software, potentially causing data processing delays or loss of access to critical services.

Mitigation Strategies

Upgrade CommServe to versions 11.46.20+, 11.44.20+, 11.40.72+, or 11.36.123+ immediately. Verify updates via Command Center's Server listing page. Ensure backups are current before upgrading.

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