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Vulnerability record · CVE-2018-18320 · published 15 October 2018

CVE-2018-18320: Asuswrt-merlin project rt-ac5300 firmware vulnerability

Asuswrt Merlin Project · Rt Ac5300 Firmware

An issue was discovered in the Merlin.PHP component 0.6.6 for Asuswrt-Merlin devices. An attacker can execute arbitrary commands because exec.php has a popen call. NOTE: the vendor indicates that Merlin.PHP is designed only for use on a trusted intranet network, and intentionally allows remote code execution

9.8 CVSS 3.0 Critical EPSS 5.2% · top 7.8%
9.8CVSS 3.0 base score, v2 7.5
5.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
14Affected product versions listed by NVD
4References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in the Merlin.PHP component 0.6.6 for Asuswrt-Merlin devices. An attacker can execute arbitrary commands because exec.php has a popen call. NOTE: the vendor indicates that Merlin.PHP is designed only for use on a trusted intranet network, and intentionally allows remote code execution

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

14 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://blog.51cto.com/010bjsoft/2298828 ExploitThird Party Advisory
https://github.com/qoli/Merlin.PHP/issues/26 ExploitThird Party Advisory
http://blog.51cto.com/010bjsoft/2298828 ExploitThird Party Advisory
https://github.com/qoli/Merlin.PHP/issues/26 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-18319Asuswrt-merlin project rt-ac5300 firmware code injection vulnerabilityAn issue was discovered in the Merlin.PHP component 0.6.6 for Asuswrt-Merlin devices. An attacker can execute arbitrary commands because api.php has …EPSS 5.4%9.8CVE-2017-11420Asuswrt-merlin project rt-ac5300 firmware memory buffer overflow vulnerabilityStack-based buffer overflow in ASUS_Discovery.c in networkmap in Asuswrt-Merlin firmware for ASUS devices and ASUS firmware for ASUS RT-AC5300, RT_AC…EPSS 5.6%7.8CVE-2017-11344Asuswrt-merlin project rt-ac5300 firmware memory buffer overflow vulnerabilityGlobal buffer overflow in networkmap in Asuswrt-Merlin firmware for ASUS devices and ASUS firmware for ASUS RT-AC5300, RT_AC1900P, RT-AC68U, RT-AC68P…EPSS 2.8%7.8CVE-2017-11345Asuswrt-merlin project rt-ac5300 firmware memory buffer overflow vulnerabilityStack buffer overflow in networkmap in Asuswrt-Merlin firmware for ASUS devices and ASUS firmware for ASUS RT-AC5300, RT_AC1900P, RT-AC68U, RT-AC68P,…EPSS 1.8%

Source: NIST National Vulnerability Database (record CVE-2018-18320), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.