CVE-2026-77091

Security feature bypass via path traversal

Published Sep 8, 2026 · Updated Sep 8, 2026

Path traversal in Commvault Cloud DataCube allows local users to bypass security feature enforcement on affected Windows and Linux hosts. Commvault has not disclosed the affected pathname-handling locus, the untrusted path source, or how traversal defeats the control. Low-privilege local access is required; Commvault has not specified the resulting data or service operations available after bypass.

CVSS severity8.5
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Commvault Cloud DataCube allows local users to bypass security feature enforcement on affected Windows and Linux hosts. Commvault has not disclosed the affected pathname-handling locus, the untrusted path source, or how traversal defeats the control. Low-privilege local access is required; Commvault has not specified the resulting data or service operations available after bypass.

The record

CVE
CVE-2026-77091
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Commvault
Product
Commvault Cloud
Classifications
CWE-22
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.36.0 <=11.36.122 changes=[{"at":"11.36.123","status":"unaffected"}]
  2. Affected versionversion=11.40.0 <=11.40.71 changes=[{"at":"11.40.72","status":"unaffected"}]
  3. Affected versionversion=11.44.0 <=11.44.19 changes=[{"at":"11.44.20","status":"unaffected"}]
  4. Affected versionversion=11.46.0 <=11.46.19 changes=[{"at":"11.46.20","status":"unaffected"}]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Commvault · Commvault Cloudversion=11.36.0 <=11.36.122 changes=[{"at":"11.36.123","status":"unaffected"}]; version=11.40.0 <=11.40.71 changes=[{"at":"11.40.72","status":"unaffected"}]; version=11.44.0 <=11.44.19 changes=[{"at":"11.44.20","status":"unaffected"}]; version=11.46.0 <=11.46.19 changes=[{"at":"11.46.20","status":"unaffected"}]

Published CVSS scores

8.5CommvaultCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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