What’s Vulnerable › Vulnerabilities

CVE-2018-19986

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 41.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-05-13 · updated 2026-06-17
• Weakness: CWE-78

Description

In the /HNAP1/SetRouterSettings message, the RemotePort parameter is vulnerable, and the vulnerability affects D-Link DIR-818LW Rev.A 2.05.B03 and DIR-822 B1 202KRb06 devices. In the SetRouterSettings.php source code, the RemotePort parameter is saved in the $path_inf_wan1."/web" internal configuration memory without any regex checking. And in the IPTWAN_build_command function of the iptwan.php source code, the data in $path_inf_wan1."/web" is used with the iptables command without any regex checking. A vulnerable /HNAP1/SetRouterSettings XML message could have shell metacharacters in the RemotePort element such as the `telnetd` string.

Affected products

• D-Link Dir-818Lw Firmware: 2.05.b03
• D-Link Dir-822 Firmware: 202krb06

References

• https://github.com/pr0v3rbs/CVE/tree/master/CVE-2018-19986%20-%2019990
• https://github.com/pr0v3rbs/CVE/tree/master/CVE-2018-19986%20-%2019990

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