Vulnerability details

CVE-2026-118579

D-Link DIR-505

D-Link DIR-505 Web Management CGI secmark1524.cgi main backdoor

CVSS 4.0

9.3Critical

Official description

A weakness has been identified in D-Link DIR-505 1.10B02. The impacted element is the function main of the file /secmark1524.cgi of the component Web Management CGI. This manipulation of the argument accu/pass/code/hash/cmds causes backdoor. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

CVSS scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R`
9.8Critical	3.0	CVEProject cvelistV5 (CNA) (VulDB)	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R`
10.0High	2.0	CVEProject cvelistV5 (CNA) (VulDB)	`AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR`

Affected products

Vendor	Product	Versions	Source
D-Link	DIR-505	1.10B02	CVEProject cvelistV5 (CNA)

References and advisories

https://vuldb.com/vuln/428018 vdb-entrytechnical-description
https://vuldb.com/vuln/428018/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-118579 third-party-advisory
https://vuldb.com/submit/1025351 third-party-advisory
https://github.com/Walnut1337/DIR-505_backdoor/tree/main/poc exploit
https://www.dlink.com/ product

Kolun on Telegram @kolunsec Exploited CVEs, key news and a daily digest Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.

Details

Published: 2026-10-29
Last updated: 2026-10-29
State: Published
Assigner (CNA): VulDB
Kolun priority: 44 · Medium

Exploit prediction (EPSS)

0.78%

Probability of exploitation in 30 days

56.4%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-912
Backdoor