CVE-2026-54420
8.5, high Known exploitedLiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability
- CVSS
- 8.5, high high CVSS v3.1
- EPSS, next 30 days
- 0.8% higher than 55.9% of scored CVEs
- Exploitation
- Confirmed in the wild
- Published
- 14 Jun 20264 months ago
Known exploited
CISA added this to the Known Exploited Vulnerabilities Catalog on 15 Jun 2026. US federal agencies had to remediate by 18 Jun 2026, a deadline that has passed.
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.
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.
Details
- Vendor
- LiteSpeed
- Product
- cPanel Plugin
- Weakness
- CWE-61 (opens in a new tab)
- Status
- Analyzed
- Updated
- 23 Jul 2026
- Assigner
- cve@mitre.org
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
References 3
Advisories 1
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Other LiteSpeed CVEs
Every LiteSpeed CVE we holdSame vendor in what we hold, not a known link between the flaws.
- CVE-2026-48172 LiteSpeed cPanel Plugin Privilege Escalation Vulnerability KEV EPSS 1% 9.8, critical
Beyond this page
Is CVE-2026-54420 in your network?
This page tells you how dangerous CVE-2026-54420 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
CVE-2026-54420 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.
-
EXYS7600 OCELOT
Find it before attackers do
Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-54420 comes with the devices to patch.
Learn more about EXYS7600 OCELOT -
EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
Learn more about EXYS7950 KONDRA
Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 16 Oct 2026, not the live upstream state.