CVE-2026-118579 (CVSS 9.8)

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.

Is your site exposed to CVE-2026-118579?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0079

Probability of exploitation

0.57%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-912 CWE-912

References

Other References

https://github.com/Walnut1337/DIR-505_backdoor/tree/main/poc https://vuldb.com/cve/CVE-2026-118579 https://vuldb.com/submit/1025351 https://vuldb.com/vuln/428018 https://vuldb.com/vuln/428018/cti https://www.dlink.com/

Frequently Asked Questions

What is CVE-2026-118579? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-118579? +

CVE-2026-118579 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0079, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-118579? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-11544

Improper Validation of Integrity Check Value vulnerability in Sharp Display Solutions projectors allows a attacker may create and run unauthorized …

CVE-2025-1204

The "update" binary in the firmware of the affected product sends attempts to mount to a hard-coded, routable IP address, …

CVE-2025-34117

A remote code execution vulnerability exists in multiple Netcore and Netis routers models with firmware released prior to August 2014 …

CVE-2026-112169

Magistra software contains undocumented backdoor functionality that allows authentication bypass and the creation of a privileged user account without credential …

CVE-2026-114353

Hidden functionality (undocumented backdoor) in the root-privileged 'assistant' daemon in DJI CrystalSky ZS600C firmware v0.3.9.7 through v0.6.6.9 on Android allows …

CVE-2024-5633

Longse model LBH30FE200W cameras, as well as products based on this device, provide an unrestricted access for an attacker located …