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High · CVSS 8.7CVE-2026-77100

MediaAgent Denial of ServiceCVE-2026-77100

Answer in brief

CVE-2026-77100 records a High severity (CVSS 8.7) vulnerability in MediaAgent Denial of Service. The current sources do not mark it as known exploited. The current feed maps Commvault/Commvault Cloud (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 13, 2026Updated Oct 13, 2026Source checked Oct 13, 2026First seen by HOL Oct 13, 2026Material review Oct 13, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Commvault/Commvault Cloud (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Commvault/Commvault Cloudgeneric>=11.46.0 <=11.46.29 || >=11.44.0 <=11.44.24 || >=11.40.0 <=11.40.77 || >=11.36.0 <=11.36.126Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Commvault/Commvault Cloud.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 13, 2026

Sources and claim methodology

  • Source referencedocumentation.commvault.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Hyperscale Path TraversalSame commvault/commvault cloud package
  • CVFS Information DisclosureSame commvault/commvault cloud package
  • CvFWD Denial of ServiceSame commvault/commvault cloud package
  • CvFWD Out-of-Bounds WriteSame commvault/commvault cloud package
  • CvFWD Null Pointer DereferenceSame commvault/commvault cloud package
  • CVFS Missing AuthenticationSame commvault/commvault cloud package

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-122
Source
CVE List V5
Source checked
Oct 13, 2026
References
1 linked source
Open source record