Vulnerability · Published Nov 14, 2025 · Assigned by VulDB

CVE-2025-13188D-Link DIR-816L authentication.cgi authenticationcgi_main stack-based overflow

Critical 9.8

In plain English

A critical-severity stack buffer overflow in DIR-816L from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)2.4%top 16.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was detected in D-Link DIR-816L 2_06_b09_beta. Affected by this vulnerability is the function authenticationcgi_main of the file /authentication.cgi. Performing manipulation of the argument Password results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is now public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Affected products (as reported)

Vendor	Product	Versions
D-Link	DIR-816L	2_06_b09_beta

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:R

References

VDB-332476 | D-Link DIR-816L authentication.cgi authenticationcgi_main stack-based overflow vdb-entry, technical-description
VDB-332476 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #685538 | D-Link DIR-816L DIR816L_REVB_FW_2_06_b09_beta Stack-based Buffer Overflow third-party-advisory
https://github.com/scanleale/IOT_sec/blob/main/DIR-816L%20stack%20overflow(authentication.cgi).pdf exploit
https://www.dlink.com/ product