CVE-2018-17787
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.66%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.66% probability · 90th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- d-link/dir-823g firmware
- Source
- cve@mitre.org
EPSS moved from 2.5% on 21 September 2026 to 3.7% on 27 October 2026.
References
- https://xz.aliyun.com/t/2834Exploit, Third Party Advisory
- https://xz.aliyun.com/t/2834Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.