CVE-2026-1685

D-Link DIR-823X Login sub_40AC74 excessive authentication

A vulnerability was identified in D-Link DIR-823X 250416. This vulnerability affects the function sub_40AC74 of the component Login. Such manipulation leads to improper restriction of excessive authentication attempts. The attack may be performed from remote. This attack is characterized by high complexity. It is stated that the exploitability is difficult. The exploit is publicly available and might be used.

Affected

D-Link · DIR-823X

CVSS v4.0 VULDB

2.9 LOWCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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 NVD

5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 VULDB

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

CVSS v2.0 VULDB

2.6 LOWAV:N/AC:H/Au:N/C:P/I:N/A:N

EPSS

1.16% chance of exploitation in the next 30 days, 67th percentile

Published

2026-01-30

Updated

2026-02-23

Proof-of-concept exploits (1)

• master-abc/cve/issues/178★ · 2025-12-22

Security advisories

• https://vuldb.com/?id.343479
• https://vuldb.com/?submit.740886
• https://www.dlink.com

References

• CVE Record
• NVD entry

Related

• CVE-2025-15076
• CVE-2025-15229
• CVE-2025-15420
• CVE-2025-15421
• CVE-2025-15424
• CVE-2025-15425