cbcvebase.
CVE-2025-10634
published 2025-09-18

CVE-2025-10634: A weakness has been identified in D-Link DIR-823X 240126/240802/250416. The impacted element is the function sub_412E7C of the file /usr/sbin/goahead of the…

PriorityP268high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
7.36%
93.7th percentile
A weakness has been identified in D-Link DIR-823X 240126/240802/250416. The impacted element is the function sub_412E7C of the file /usr/sbin/goahead of the component Environment Variable Handler. This manipulation of the argument terminal_addr/server_ip/server_port causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be exploited.

Affected

6 ranges
VendorProductVersion rangeFixed in
d-linkdir-823x——
d-linkdir-823x——
d-linkdir-823x——
dlinkdir-823x_firmware——
dlinkdir-823x_firmware——
dlinkdir-823x_firmware——

Detection & IOCsextracted from sources · hover to see the quote

path/usr/sbin/goahead↗
url/goform/set_server_settings↗
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS D-Link set_server_settings Multiple Parameters Command Injection Attempt (CVE-2025-10634)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:27; content:"/goform/set_server_settings"; fast_pattern; http.request_body; pcre:"/(?:terminal_addr|server_ip|server_port)\x3d[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/"; reference:url,github.com/Cpppq43/D-Link/blob/main/DIink-DIR-823x.md; reference:cve,2025-10634; classtype:attempted-admin; sid:2064794; rev:1; metadata:affected_product D_Link, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_09_18, cve CVE_2025_10634, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_18, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
  • →Detect POST requests to /goform/set_server_settings with command injection metacharacters (;, newline, backtick, pipe, $) in the terminal_addr, server_ip, or server_port parameters — both raw and URL-encoded forms.
  • →The URI /goform/set_server_settings has a fixed length of 27 bytes; use a bsize match to reduce false positives.
  • →The vulnerable function is sub_412E7C inside /usr/sbin/goahead; binary-level analysis or firmware emulation should target this function for dynamic testing.
  • →Attack is network-exploitable with no authentication implied; perimeter and internal deployment of the Snort/Suricata rule (sid:2064794) is recommended.
  • ·The Snort/Suricata rule only covers plaintext HTTP traffic (tls_state plaintext); HTTPS-wrapped traffic to the device management interface will not be detected by this rule.
  • ·The rule targets inbound POST traffic to $HOME_NET; ensure D-Link DIR-823X management interfaces are included in the $HOME_NET variable for the rule to fire correctly.
  • ·Affected firmware versions are 240126, 240802, and 250416; devices on other firmware versions may not be vulnerable but should still be monitored pending vendor confirmation.

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv4.02.1LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
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