CVE-2026-13737Network attack vector

Unauthenticated command restriction bypass via allowlist evasion

Published Aug 11, 2026 · Updated Aug 11, 2026

Incorrect authorization in Commvault Cloud allows remote attackers to bypass CommServe command restrictions over the network. Commvault identifies an allowlist bypass in command execution authorization but does not disclose the affected function or validation error. No account or user interaction is required, but exploitation has high complexity and authorizes otherwise restricted commands.

CVSS severity9.2
Critical
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Commvault Cloud allows remote attackers to bypass CommServe command restrictions over the network. Commvault identifies an allowlist bypass in command execution authorization but does not disclose the affected function or validation error. No account or user interaction is required, but exploitation has high complexity and authorizes otherwise restricted commands.

The record

CVE
CVE-2026-13737
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Commvault
Product
Commvault Cloud
Classifications
CWE-863, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 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 <=11.36.113 changes=[{"at":"11.36.114","status":"unaffected"}]
  2. Affected versionversion=11.40.0 <=11.40.62 changes=[{"at":"11.40.63","status":"unaffected"}]
  3. Affected versionversion=11.44.0 <=11.44.10 changes=[{"at":"11.44.11","status":"unaffected"}]
  4. Affected versionversion=11.46.0 <=11.46.9 changes=[{"at":"11.46.10","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Commvault · Commvault Cloudversion=11.36.0 <=11.36.113 changes=[{"at":"11.36.114","status":"unaffected"}]; version=11.40.0 <=11.40.62 changes=[{"at":"11.40.63","status":"unaffected"}]; version=11.44.0 <=11.44.10 changes=[{"at":"11.44.11","status":"unaffected"}]; version=11.46.0 <=11.46.9 changes=[{"at":"11.46.10","status":"unaffected"}]

Published CVSS scores

9.2CommvaultCVSS:4.0/AV:N/AC:H/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-863Incorrect Authorization
T1210Exploitation of Remote Services

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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