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CVE-2026-124003

HIGHCVSS 7.8/10EPSS 0.69%

Last modified

CVE-2026-124003 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. XWEB EVO before 5.6.2 contains a command injection vulnerability where the setuid-root Lua CGI interpreter wlua executes system("/usr/bin/lua "+argv) on unsanitized input. Attackers can craft malicious input reached through a .lua CGI endpoint to inject arbitrary commands into the concatenated argv string, achieving command execution with root privileges. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

XWEB EVO before 5.6.2 contains a command injection vulnerability where the setuid-root Lua CGI interpreter wlua executes system("/usr/bin/lua "+argv) on unsanitized input. Attackers can craft malicious input reached through a .lua CGI endpoint to inject arbitrary commands into the concatenated argv string, achieving command execution with root privileges. This product line reached it's end of service date in March 2026.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0
8.5/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.69%

53.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
CopelandXWEB EVO< 5.6.2

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-124003?
XWEB EVO before 5.6.2 contains a command injection vulnerability where the setuid-root Lua CGI interpreter wlua executes system("/usr/bin/lua "+argv) on unsanitized input. Attackers can craft malicious input reached through a .lua CGI endpoint to inject arbitrary commands into the concatenated argv string, achieving command execution with root privileges. This product line reached it's end of service date in March 2026.
How severe is CVE-2026-124003?
CVE-2026-124003 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.
How do I fix CVE-2026-124003?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST