Critical severity · published Oct 28, 2026
CVE-2026-118579
D-Link DIR-505 Web Management CGI secmark1524.cgi main backdoor
New
9.8
CVSS
–
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
DIR-505 · D-Link
1.10B02 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-118579
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-118579
vdb-entry
https://vuldb.com/vuln/428018
signature
https://vuldb.com/vuln/428018/cti
third-party-advisory
https://vuldb.com/cve/CVE-2026-118579
third-party-advisory
https://vuldb.com/submit/1025351
exploit
https://github.com/Walnut1337/DIR-505_backdoor/tree/main/poc
product
https://www.dlink.com/