Vulnerability · Published Jan 30, 2026 · Assigned by VulDB

CVE-2026-1685D-Link DIR-823X Login sub_40AC74 excessive authentication

Low 3.7

In plain English

A low-severity security flaw in DIR-823X from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities).

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)1.2%top 32.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
D-Link	DIR-823X	250416

Weakness: CWE-307, CWE-799 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

References

VDB-343479 | D-Link DIR-823X Login sub_40AC74 excessive authentication vdb-entry, technical-description
VDB-343479 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #740886 | D-Link dir-823X 250416 A logical flaw in the authentication mechanism exists third-party-advisory
https://github.com/master-abc/cve/issues/17 exploit, issue-tracking
https://www.dlink.com/ product