CVE-2026-54420 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-54420HIGH

LiteSpeed cPanel Plugin

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   L   N  C  H  H  H    8.5   .0144   71.0   YES

AFFECTED
  Product        Versions  Fixed
  cPanel Plugin  2.3 –     —

TIMELINE
  Jun 14  Reserved by mitre
  Jun 15  Added to CISA KEV, remediation due 2026-06-18
  Jun 15  Published (CNA: mitre)
  Jun 19  DUE DATE PASSED — CVE-2026-54420 (LiteSpeed Technologies cPanel Plugin). CISA remediation deadline was June 18, 2026; still in catalog.
  Jul 23  ENRICHED — CVE-2026-54420 (LiteSpeed cPanel Plugin). Received CVSS 8.5 and CPE data from NVD.

CWE-61 · CNA: mitre · CVSS v3.1 · 3 references · NVD status: Analyzed · KEV due June 18, 2026

Description

LiteSpeed cPanel plugin before 2.4.8 (as distributed in LiteSpeed WHM PlugIn before 5.3.2.0) mishandles symlinks provided by a user with FTP or web shell access on a shared hosting server running CloudLinux/CageFS, as exploited in the wild in May 2026.

Lifecycle

Complete event history — 5 events, chronological
Date	Event	Detail
June 14, 2026	Reserved	Reserved by mitre
June 15, 2026	KEV ADDED	Added to CISA KEV, remediation due 2026-06-18
June 15, 2026	Published	Published (CNA: mitre)
June 19, 2026	DUE DATE PASSED	DUE DATE PASSED — CVE-2026-54420 (LiteSpeed Technologies cPanel Plugin). CISA remediation deadline was June 18, 2026; still in catalog.
July 23, 2026	ENRICHED	ENRICHED — CVE-2026-54420 (LiteSpeed cPanel Plugin). Received CVSS 8.5 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
LiteSpeed Technologies	cPanel Plugin	—	2.3	—

Weaknesses

CWE-61

References (3)

https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/ [Vendor Advisory]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420 [US Government Resource]
https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanel [Product]

Authoritative record: CVE-2026-54420 at cve.org

Vendors: litespeed technologies

Weaknesses: CWE-61

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-54420 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.