CVE-2026-118579

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

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.

Affected

D-Link · DIR-505

CVSS v4.0 VULDB

8.9 HIGHCVSS: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/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

CVSS v3.1 VULDB

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 VULDB

10.0 HIGHAV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS

0.79% chance of exploitation in the next 30 days, 56th percentile

Published

2026-10-28

Updated

2026-10-29

Proof-of-concept exploits (1)

• Walnut1337/DIR-505_backdoor/tree/main/pocRepo stars 0★ · pushed 2026-10-12 · snapshot
  3 files

  poc/poc_arbitrary_read.shpoc/tftp_client.pypoc/trigger_backdoor.sh

CVE references

• https://vuldb.com/cve/CVE-2026-118579ADVISORY
• https://vuldb.com/submit/1025351ADVISORY
• https://vuldb.com/vuln/428018REFERENCE
• https://vuldb.com/vuln/428018/ctiREFERENCE
• https://www.dlink.comREFERENCE

References

• CVE Record
• NVD entry

Related

• CVE-2014-3936
• CVE-2015-2051
• CVE-2016-5681
• CVE-2026-110536
• CVE-2026-120189
• CVE-2026-94089