--- title: "CVE-2026-55573: e107 - Remote Code Execution" description: "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." url: https://panop.io/threat-heartbeat/CVE-2026-55573/ --- # 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-55573) ## 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](https://cwe.mitre.org/data/definitions/502.html) ## 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 - [https://nvd.nist.gov/vuln/detail/CVE-2026-55573](https://nvd.nist.gov/vuln/detail/CVE-2026-55573) - [https://github.com/e107inc/e107/releases/tag/v2.3.7](https://github.com/e107inc/e107/releases/tag/v2.3.7) - [https://github.com/e107inc/e107/security/advisories/GHSA-c8h6-wpj3-4cr8](https://github.com/e107inc/e107/security/advisories/GHSA-c8h6-wpj3-4cr8) - [https://github.com/e107inc/e107/commit/5d6d649e8cf01854d6024d07997c2449fdd75f24](https://github.com/e107inc/e107/commit/5d6d649e8cf01854d6024d07997c2449fdd75f24) - [https://github.com/e107inc/e107/commit/6c404295213952aedb9b3689be19dd4c7ba550b0](https://github.com/e107inc/e107/commit/6c404295213952aedb9b3689be19dd4c7ba550b0) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)