CVE-2018-19986
9.8
CRITICAL · CVSS 3.0 · EPSS 41.6% (pctl 99)
Patch early
EPSS 41.6% — above the 10% action threshold.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 41.61% — more likely to be exploited than 99% of all CVEs |
| Weakness | CWE-78 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2019-05-13 |
| Last modified | 2026-06-17 |
Affected (4)
| Vendor | Product |
|---|---|
| d-link | dir-818lw firmware |
| d-link | dir-822 firmware |
| dlink | dir-818lw |
| dlink | dir-822 |
References
→ the Explorer · watch your stack · NVD