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CVE Record

CVE-2026-77089: Command Center API Authentication Bypass

Command Center API contained an authentication bypass issue affecting privilege management. Software customers upgrade to resolved maintenance release. Update Command Center.

CriticalCVSS 9.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

Commvault Cloud Command Center has a critical authentication weakness that could let an unauthenticated network attacker bypass identity checks in privilege-management functions. Successful abuse could compromise confidentiality, integrity, and availability. Organizations using the listed releases should treat the update as urgent, particularly where the Command Center API is reachable from untrusted networks.

Executive priority

Prioritize emergency inventory and accelerated remediation. The vulnerability combines unauthenticated network reachability with potential full compromise of the affected system. Internet-accessible or broadly reachable management interfaces should receive first attention. Escalate to Commvault for precise fixed-version guidance because the supplied material does not name resolved maintenance-release numbers.

Technical view

CVE-2026-77089 is a CWE-290 authentication-bypass vulnerability in the Command Center API. Its CVSS 4.0 score is 9.3, with network access, low complexity, no privileges, and no user interaction required. The supplied record reports high impact to vulnerable-system confidentiality, integrity, and availability, but no subsequent-system impact.

Likely exposure

Potential exposure includes Commvault Cloud releases 11.46.0, 11.44.0, 11.40.0, and 11.36.0. Risk is greatest when the Command Center API is reachable by untrusted users or networks. The supplied sources do not clarify affected configurations, deployment defaults, or the exact resolved maintenance-release numbers.

Exploitation context

The CVSS vector indicates remotely reachable, low-complexity exploitation without prior authentication or user interaction. However, the supplied bundle marks this CVE as absent from KEV and provides no evidence of active exploitation, public proof-of-concept code, or observed attacks. Exploit maturity therefore remains unconfirmed.

Researcher notes

The public description is sparse and does not identify the affected endpoint, authentication trust boundary, vulnerable configuration, or root cause beyond CWE-290. Validate defensively against authorized systems only. Avoid assuming every installation is exploitable until its version, API reachability, configuration, and vendor maintenance-release status are confirmed.

Mitigation direction

  • Identify Command Center instances running any listed release.
  • Obtain the resolved maintenance-release details from Commvault's advisory or support channel.
  • Upgrade affected Command Center deployments to the vendor-designated resolved maintenance release.
  • Restrict Command Center API access to trusted administrative networks until updates are complete.
  • Review privileged accounts and administrative activity for unexpected changes.

Validation and detection

  • Confirm the installed Commvault Cloud and Command Center maintenance-release versions.
  • Verify each instance is outside the vendor-listed vulnerable release set.
  • Test that unauthenticated clients cannot access privilege-management API functions.
  • Review authentication and privilege-management logs for anomalous unauthenticated activity.
  • Confirm network controls prevent untrusted access to the Command Center API.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-290: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-77089 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.3 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
2Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.3CVSS 4.0CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——Commvault

Vulnerability scoring details

Base CVSS 4.0 score

9.3Critical
CVSS 4.0 vector shape for CVE-2026-77089Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CommvaultCommvault Cloud11.46.0, 11.44.0, 11.40.0, 11.36.0unknown
Weakness

CWE details

CWE-290

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-290 · source CWE mapping

Authentication Bypass by Spoofing

Authentication Bypass by Spoofing represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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