TI-2026-71797 Aliases CVE-2026-77100 GHSA-83mj-r2gx-wf57

Commvault Cloud MediaAgent Denial of Service

MEDIUM 43CWE-122Published 2026-10-13 · Updated 2026-10-13

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

Commvault Cloud contains a heap-based buffer overflow (CWE-122) in MediaAgent that affects service availability. An unauthenticated remote attacker can cause a denial of service by sending crafted input to the service. Affected ranges are from 11.46.0 through 11.46.29, from 11.44.0 through 11.44.24, from 11.40.0 through 11.40.77, and from 11.36.0 through 11.36.126.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

MediaAgent contained a heap-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update Commvault installation of MediaAgents and HyperScale.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00316 24th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Commvault	Commvault Cloud	11.46.0 – 11.46.29; 11.44.0 – 11.44.24; 11.40.0 – 11.40.77; 11.36.0 – 11.36.126	—	No fix listed	CNA

Commvault Cloud VendorCommvault Affected 11.46.0 – 11.46.29; 11.44.0 – 11.44.24; 11.40.0 – 11.40.77; 11.36.0 – 11.36.126 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:commvault:commvault::::::::	—	—	Commvault

cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:* Versions — — ·Commvault

Remediation

The sources list no fixed version for Commvault Cloud. Customers should upgrade to the resolved maintenance release and update Commvault installations of MediaAgents and HyperScale, but the sources do not name the release.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Timeline

2026-10-13 Threatist record created from CVE-2026-77100
2026-10-13 Alias added: GHSA-83mj-r2gx-wf57

References

Other 1

https://documentation.commvault.com/securityadvisories/CV_2026_10_6.html

TI-2025-24197 Commvault Command Center Innovation Release <= 11.38.25 Unathenticated Install Package Path Traversal KEVCVSS 4.0CRITICAL 9.3
TI-2025-03473 Commvault Web Server unspecified vulnerability KEVCVSS 4.0HIGH 8.7
TI-2021-13983 This vulnerability allows remote attackers to execute arbitrary code on affected… CVSS 3.1HIGH 8.8
TI-2017-13252 A Command Injection issue was discovered in ContentStore/Base/CVDataPipe.dll in Commvault… CVSS 3.0CRITICAL 9.8
TI-2021-13982 Unrestricted file upload in Commvault CommCell CVSS 3.1HIGH 8.8
TI-2025-35673 Path traversal in Commvault CommCell CVSS 4.0HIGH 8.7

See all 42 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences