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CVE-2026-77101

CommServe Stack-based Buffer Overflow

HIGH
7.5
CVSS Score
Published: September 8, 2026 at 12:12 PM UTC
Updated: September 9, 2026 at 05:27 PM UTC
1 product affected across 1 vendorCommvault· also runs on 2 platforms

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

CommServe contained a stack-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update CommServe.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Commvault· Commvault
95%
11.36.0 ≤ v ≤ 11.36.12211.36.0 ≤ v < 11.36.12311.40.0 ≤ v ≤ 11.40.7111.40.0 ≤ v < 11.40.7211.44.0 ≤ v ≤ 11.44.1911.44.0 ≤ v < 11.44.2011.46.0 ≤ v ≤ 11.46.1911.46.0 ≤ v < 11.46.2011.36.011.40.011.44.011.46.0
Affected range stops below 11.36.123, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.40.72, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.44.20, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.46.20, so it looks safe — our inference, not a vendor statement
linux-linux-kernel (environment) · microsoft-windows (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://documentation.commvault.com/securityadvisories/CV_2026_08_3.html

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-121

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