CVE-2026-77099: Flaw in Commvault Cloud Scores 9.3 on CVSS
A newly published critical vulnerability in Commvault Cloud carries a CVSS score of 9.3. Here is what is affected and how to respond.
Key points
- CVE-2026-77099 affects Commvault Cloud.
- CVSS 9.3 (Critical).
- No exploitation confirmed yet.
A critical security flaw tracked as CVE-2026-77099 has been published in the National Vulnerability Database for Commvault Cloud, with a CVSS base score of 9.3.
At a glance
- CVE
- CVE-2026-77099
- Product
- Commvault Cloud
- CVSS
- 9.3 Critical
- Weakness
- —
- Exploited
- No known exploitation
What is the vulnerability?
The NVD entry states: CVFS contained an input validation issue affecting command execution. Software customers upgrade to resolved maintenance release. Update CVFS.
Affected versions
| Vendor | Product | Versions |
|---|---|---|
| Commvault | Commvault Cloud | up to 11.46.29, up to 11.44.24, up to 11.40.77, up to 11.36.126 |
| Commvault | Grid(HSX) CVFS | up to 5.0.14.4 |
Is it being exploited?
There is no public confirmation of exploitation at the time of publication. It does not appear in CISA's Known Exploited Vulnerabilities catalog. We will update this report if that changes.
What should you do?
- Identify whether the affected product and versions run in your environment.
- Apply the vendor update listed in the advisory as soon as it is available.
- Limit network exposure of the affected service until it is patched.
- Monitor the vendor advisory for updated guidance or exploitation reports.
What to do and how to stay safe: CVE-2026-77099
- Patch scores alone ignore context like network exposure and asset criticality.
- You must map vulnerabilities to specific business risks to prioritize correctly.
- Continuous exposure data replaces static scanning for accurate prioritization.
Prioritize vulnerabilities by actual exploitability and business impact, not by theoretical severity scores. Update your asset context and exposure data continuously to maintain accurate risk rankings.
Step-by-step guide: Risk Based Vulnerability Management: Prioritize Fixes by Actual Threat
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is CVE-2026-77099?
CVE-2026-77099 is a security vulnerability in Commvault Cloud.
How severe is CVE-2026-77099?
It has a CVSS score of 9.3 Critical.
Is CVE-2026-77099 being exploited?
There is no public confirmation of exploitation at the time of publication.
