← Vulnerability feed

Vulnerability record · CVE-2018-17787 · published 2 October 2018

CVE-2018-17787: D-link dir-823g firmware os command injection vulnerability

D Link · Dir 823g Firmware

On D-Link DIR-823G devices, the GoAhead configuration allows /HNAP1 Command Injection via shell metacharacters in the POST data, because this data is sent directly to the "system" library function.

9.8 CVSS 3.0 Critical EPSS 3.7% · top 10.8% CWE-78 · OS command injection
9.8CVSS 3.0 base score, v2 7.5
3.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

On D-Link DIR-823G devices, the GoAhead configuration allows /HNAP1 Command Injection via shell metacharacters in the POST data, because this data is sent directly to the "system" library function.

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

Affected products

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

References

LinkTags
https://xz.aliyun.com/t/2834 ExploitThird Party Advisory
https://xz.aliyun.com/t/2834 ExploitThird Party Advisory

Track CVE-2018-17787 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

9.8CVE-2019-7297D-link dir-823g firmware os command injection vulnerabilityAn issue was discovered on D-Link DIR-823G devices with firmware through 1.02B03. A command Injection vulnerability allows attackers to execute arbit…EPSS 12%9.8CVE-2018-17881D-link dir-823g firmware weak password recovery vulnerabilityOn D-Link DIR-823G 2018-09-19 devices, the GoAhead configuration allows /HNAP1 SetPasswdSettings commands without authentication to trigger an admin …EPSS 1.5%9.8CVE-2018-17786D-link dir-823g firmware improper authentication vulnerabilityOn D-Link DIR-823G devices, ExportSettings.sh, upload_settings.cgi, GetDownLoadSyslog.sh, and upload_firmware.cgi do not require authentication, whic…EPSS 4.1%7.5CVE-2018-17880D-link dir-823g firmware missing authentication for critical function vulnerabilityOn D-Link DIR-823G 2018-09-19 devices, the GoAhead configuration allows /HNAP1 RunReboot commands without authentication to trigger a reboot.EPSS 1.6%8.8CVE-2026-53266Linux kernel ebtables SNAT out-of-bounds write in ARP rewriteThe ebtables SNAT target rewrites the ARP sender hardware address via skb_store_bits() without first making that range writable. When the ARP SHA byt…KEVEPSS 0.65%analysed8.8CVE-2026-87491Google Chrome V8 out-of-bounds write enables sandbox code executionChrome before 153.0.8010.36 contains an out-of-bounds write in the V8 JavaScript engine. A crafted HTML page can trigger the memory corruption, and b…KEVEPSS 3.1%analysed9.8CVE-2025-25249Fortinet FortiOS and FortiSwitchManager heap buffer overflow via crafted packetsA heap-based buffer overflow (CWE-122/CWE-787) in Fortinet FortiOS 6.4 through 7.6.3 and FortiSwitchManager 7.0 through 7.2.6 lets an unauthenticated…KEVEPSS 3.9%analysed7.8CVE-2026-83549SonicWall SMA1000 AMC OS Command InjectionThe SMA1000 Appliance Management Console contains an OS command injection flaw (CWE-78) that lets an authenticated administrator execute arbitrary op…KEVEPSS 11%analysed

Source: NIST National Vulnerability Database (record CVE-2018-17787), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.