CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Called exploited 13 days before disclosure.
Measured from the CVE publication date to the earliest of 3 KEV catalogues that list it.
The life of this vulnerability
- CVE published
- First KEV listing13d
- Last KEV listing14d
- Last sighting25d
Gaps are compressed to equal steps. The elapsed time is printed under each.
Which catalogues call it exploited
- CISA KEVUS federallisted Jun 15, 2026
- EUVDENISA, European Unionlisted Jun 15, 2026
- VulnCheck KEVcommercial researchlisted Jun 1, 2026
- CIRCLaggregator, mirrors the abovelisted Jun 14, 2026, not counted
3 catalogues list it. CIRCL aggregates the others and is shown but not counted.
Public exploitation evidence
- reported exploitationwww.recordedfuture.com/blog/june-2026-cve-landscape
- reported exploitationwww.acn.gov.it/portale/w/rilevato-sfruttamento-di-vulnerabil
- reported exploitationwww.cisa.gov/sites/default/files/feeds/known_exploited_vulne
- reported exploitationwww.cve.org/CVERecord?id=CVE-2026-54420
- reported exploitationblog.litespeedtech.com/2026/06/01/security-update-for-litesp
5 public reports collected from VulnCheck and CIRCL, first on Jun 1, 2026. Each links to its original source. We have not verified them.
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.
Required action (CISA)
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.