CVE-2026-55573 e107 - Remote Code Execution

e107 < 2.3.7 contains an insecure deserialization caused by unserialize() of attacker-controlled previous_steps POST parameter in install.php, letting unauthenticated attackers execute arbitrary PHP functions with web server privileges, exploit requires access to install.php.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
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
14 October 2026
Updated
15 October 2026
Weakness
CWE-502

Vendor fix

Update to version 2.3.7 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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