Affects Commvault DataCube (enterprise backup infrastructure); RCE in backup components can disrupt operations and data integrity across many organizations.
CVE-2026-77091
Path traversal in Commvault DataCube enabling remote code execution.
Is CVE-2026-77091 being exploited?
Not confirmed. CVE-2026-77091 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.13% probability of exploitation in the next 30 days.
How severe is CVE-2026-77091?
CVE-2026-77091 is rated High with a CVSS score of 8.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-77091?
Yes. A fix has been recorded for CVE-2026-77091. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-77091 affect?
CVE-2026-77091 affects Commvault DataCube, Content Extractor, Index Store. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-77091?
Apply vendor maintenance release to Content Extractor and Index Store immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Path traversal bypasses security enforcement allowing remote code execution, arbitrary file write and potential full system compromise.
Immediate action required
- affected>= 11.46.0 and <= 11.46.19
- affected>= 11.44.0 and <= 11.44.19
- affected>= 11.40.0 and <= 11.40.71
- affected>= 11.36.0 and <= 11.36.122
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.