CVE-2026-77092

Privilege escalation via untrusted data deserialization

Published Sep 8, 2026 · Updated Sep 8, 2026

Deserialization of untrusted data in Commvault Cloud Content Extractor allows local users to escalate privileges on Windows and Linux. Content Extractor deserializes untrusted data without sufficiently validating the resulting objects; the vendor has not disclosed the data format or code path. The attack requires low privileges, high complexity, and additional environmental conditions, and its effects remain on the vulnerable host.

CVSS severity7.3
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in Commvault Cloud Content Extractor allows local users to escalate privileges on Windows and Linux. Content Extractor deserializes untrusted data without sufficiently validating the resulting objects; the vendor has not disclosed the data format or code path. The attack requires low privileges, high complexity, and additional environmental conditions, and its effects remain on the vulnerable host.

The record

CVE
CVE-2026-77092
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Commvault
Product
Commvault Cloud
Classifications
CWE-502, T1068
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

7.3CommvaultCVSS:4.0/AV:L/AC:H/AT:P/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1068Exploitation for Privilege Escalation

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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