Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since June 15, 2026.
CVE-2026-54420
LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability
Added to KEV June 15, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-54420
- CWE
- CWE-61
- Affected products
- cPanel Plugin · LiteSpeed cPanel Plugin · LiteSpeed
What happened
LiteSpeed cPanel plugin contains a UNIX symbolic link (Symlink) following vulnerability that could allow a user with FTP or web shell access on a shared hosting server running CloudLinux/CageFS.
What it means for your business
LiteSpeed cPanel Plugin is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-54420). LiteSpeed cPanel plugin contains a UNIX symbolic link (Symlink) following vulnerability that could allow a user with FTP or web shell access on a shared hosting server running CloudLinux/CageFS. CISA remediation due date: 2026-06-18. PremierePC tracks KEV alerts for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
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.
CISA due date: June 18, 2026
Sources
Need help patching?
PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.