CVE-2018-18320
** DISPUTED ** An issue was discovered in the Merlin.PHP component 0.6.6 for Asuswrt-Merlin...
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
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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
- Record
CVE-2018-18320- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
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
- Record
CVE-2018-18320- Updated
- 2026-11-02
EUVDEUVD-2018-10053 No score
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
- Record
EUVD-2018-10053- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9p2j-49w6-xprr
** DISPUTED ** An issue was discovered in the Merlin.PHP component 0.6.6 for Asuswrt-Merlin...
** DISPUTED ** 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.
- Record
GHSA-9p2j-49w6-xprr- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
- asuswrt-merlin project rt-ac1900 firmware
- asuswrt-merlin project rt-ac2900 firmware
- asuswrt-merlin project rt-ac3100 firmware
- asuswrt-merlin project rt-ac3200 firmware
- asuswrt-merlin project rt-ac5300 firmware
- asuswrt-merlin project rt-ac56u firmware
- asuswrt-merlin project rt-ac66u b1 firmware
- asuswrt-merlin project rt-ac68p firmware
- asuswrt-merlin project rt-ac68u firmware
- asuswrt-merlin project rt-ac68uf firmware
- asuswrt-merlin project rt-ac86u firmware
- asuswrt-merlin project rt-ac87 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-18320 is a critical vulnerability (CVSS 9.8) in Asuswrt-merlin Project Rt-ac1900 Firmware, published October 15, 2018. Its validity is disputed. EPSS puts the chance of exploitation in the next 30 days at 5.24%, the 92nd percentile.