CVE-2026-54420

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.014 · 73 %ileexploit · PoCEUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 4 exploits · PoC

Likely / severe?

1.44% (73rd) EPSS

CVSS 8.5 · high

Is it mine?

3 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

added 2026-06-15remediate by 2026-06-18

required action Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

EPSS · scored 2026-10-27

LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.5highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.5highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · cve@mitre.org USexploitability 1.8 · impact 6

v3.18.5highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-61US

exploits (4)

Public proof-of-concept and weaponised exploit code.

HORKimhab/CVE-2026-54420CVE-2026-54420PoC · poc_in_github
Resellnom/litespeed-cpanel-cve-2026-54420-fixResellnom/litespeed-cpanel-cve-2026-54420-fixPoC · poc_in_github
fevar54/CVE-2026-54420-LiteSpeed-Symlink-ExploitPoC de CVE-2026-54420: explotacion via symlink en el plugin LiteSpeed de cPanel/WHM.PoC · poc_in_github
mahfuzreham/litespeed-cpanel-cve-2026-54420-fixmahfuzreham/litespeed-cpanel-cve-2026-54420-fixPoC · poc_in_github

affected products (3)

Products and version ranges known to be affected.

LiteSpeed Technologies cPanel Plugin2.3 → 2.4.8enisa_euvdEU
litespeedtech litespeed cpanel plugin< 2.4.8nvdUScpe:2.3:a:litespeedtech:litespeed_cpanel_plugin:*:*:*:*:*:*:*:*
litespeedtech litespeed whm plugin< 5.3.2.0nvdUScpe:2.3:a:litespeedtech:litespeed_whm_plugin:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2026-06-14modified 2026-07-23

references (8)

External citations — patches, advisories, analysis.

scry

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