Stack-Based Buffer Overflow in CommServe

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Commvault

Description

CommServe contained a stack-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

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-77101

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-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

CommServe had a stack-based buffer overflow issue that could disrupt service availability. This flaw allows attackers to potentially crash the service or execute arbitrary code by sending specially crafted input.

Impact Analysis

This vulnerability could lead to service outages, data loss, or unauthorized access to systems running CommServe. It may also allow attackers to gain control of affected systems.

Mitigation Strategies

Update CommServe to the resolved maintenance release to address the stack-based buffer overflow issue affecting service availability.

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