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Back to active CVEs
Critical · CVSS 9.9CVE-2026-12591

Privilege EscalationCVE-2026-12591

Answer in brief

CVE-2026-12591 records a Critical severity (CVSS 9.9) vulnerability in Privilege Escalation. The current sources do not mark it as known exploited. The current feed maps Zohocorp/M365 Manager Plus (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 Nov 12, 2026Updated Nov 12, 2026Source checked Nov 12, 2026First seen by HOL Nov 12, 2026Material review Nov 12, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.9. 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 Zohocorp/M365 Manager Plus (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Zohocorp/M365 Manager Plusgeneric>=0 <48184818

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Zohocorp/M365 Manager Plus.
  2. 2Review the reported fix. Update Zohocorp/M365 Manager Plus to 4818 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 12, 2026

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

  2. Source modified

    Nov 12, 2026

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

  3. First seen by HOL

    Nov 12, 2026

Sources and claim methodology

  • Source referencemanageengine.com
Upstream source description

Zohocorp ManageEngine M365 Manager Plus versions below 4818 is affected by an authenticated technician may exploit insufficient permission validation in the delegated administration interface to escalate privileges beyond their intended scope, which could result in remote code execution during administrative processing.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Oxygen MyData for WooCommerce 3.0.0 - 3.0.8 - Unauthenticated Arbitrary Order Completion via EveryPay Status CallbackAlso CWE-862

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-862
Source
CVE List V5
Source checked
Nov 12, 2026
References
1 linked source
Open source record