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VulnerabilityCVE-2026-87899Published 2026-09-23

CVE-2026-87899 — WebPros cPanel

critical (derived)

As of 2026-09-24, CVE-2026-87899 is a Critical-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in WebPros cPanel, CVSS v4.0 9.4, EPSS 0.5% (45.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-87899, most recently “cPanel/WHM CalDAV/CardDAV and WP Toolkit Flaws Enable Cross-Account Access and Root Privilege Escalation (CVE-2026-68490, CVE-2026-87899, CVE-2026-87900)”.

CVSS v4.0
9.4/10Critical (derived)
EPSS
0.5%Higher than 45.7% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
6.5/10Threadlinqs triage score
Published
Updated 2026-09-24
CVSS v4.0 9.4 (Critical, derived from score) · EPSS 0.5% (higher than 45.7% of all scored CVEs) · Priority 6.5/10 · Published 2026-09-23

Last updated:

What is CVE-2026-87899?

Execution with unnecessary privileges in cPanel allows remote authenticated users to execute arbitrary code with root privileges.

The record classifies CVE-2026-87899 under weakness class CWE-250. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 17 days ago.

Severity and exploitation probability

CVSS v4.0 base score
9.4 — Critical (derived from score)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS (FIRST)
0.5% probability of exploitation in the next 30 days, higher than 45.7% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
6.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-09-23, last modified 2026-09-24

Is CVE-2026-87899 being exploited?

It currently carries a trending score of 42 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-87899

No vendor patch reference has been recorded for CVE-2026-87899 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-87899

1 tracked threat in the Threadlinqs corpus references CVE-2026-87899, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Other references