# CVE-2026-12591: Privilege Escalation

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Zohocorp / M365 Manager Plus: ≥ 0; < 4818 (affected, custom). Source: CNA: Zohocorp

## Severity and prioritization

- CVSS 3.1: 9.9 (critical); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H; source: CNA: Zohocorp

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-862

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.manageengine.com/microsoft-365-management-reporting/CVE-2026-12591.html (CNA: Zohocorp)

## Provenance

- CNA: Zohocorp: https://www.cve.org/CVERecord?id=CVE-2026-12591; retrieved 2026-11-12; source updated 2026-11-12

Revision: 7bbcaa561b76f42c8708742f918f48c2cd641a3abc79809eaf931b908bd4f0c9

Canonical: https://y2.dev/cve/CVE-2026-12591

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.