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

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-11-14 · updated 2026-10-18
Weakness: CWE-119

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

D-Link DIR-816L: 2.06.b09-beta

References

https://github.com/scanleale/IOT_sec/blob/main/DIR-816L%20stack%20overflow(authentication.cgi).pdf
https://vuldb.com/?ctiid.332476
https://vuldb.com/?id.332476
https://vuldb.com/?submit.685538
https://www.dlink.com/
https://github.com/scanleale/IOT_sec/blob/main/DIR-816L%20stack%20overflow(authentication.cgi).pdf

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