CVE-2026-39117 AltumCode 66Uptime - Remote Code Execution

AltumCode 66Uptime < 54.0.0 and 66Uptime ping-servers plugin < 2.0.0 contain a remote code execution caused by improper input handling in index.php, letting remote attackers execute arbitrary code, exploit requires no special privileges.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.75% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Upgrade 66Uptime to version 54.0.0 and ping-servers plugin to version 2.0.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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