CVE-2026-77089Network attack vector

Unauthenticated privilege changes via API bypass

Published Sep 8, 2026 · Updated Sep 9, 2026

Authentication bypass in the Commvault Cloud Command Center API allows remote attackers to alter privilege management without credentials. Commvault has not disclosed which API handler or authentication decision accepts the unauthenticated request. Network reachability to the API is sufficient; successful abuse grants unauthorized privileges with access to protected data and service operations.

CVSS severity9.3
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in the Commvault Cloud Command Center API allows remote attackers to alter privilege management without credentials. Commvault has not disclosed which API handler or authentication decision accepts the unauthenticated request. Network reachability to the API is sufficient; successful abuse grants unauthorized privileges with access to protected data and service operations.

The record

CVE
CVE-2026-77089
Published
Sep 8, 2026
Updated
Sep 9, 2026
Vendor
Commvault
Product
Commvault Cloud
Classifications
CWE-290, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 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 vectornetwork
Required privilegesunauthenticated

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

9.3CommvaultCVSS:4.0/AV:N/AC:L/AT:N/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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