Vulnerability · Published Nov 15, 2025 · Assigned by VulDB

CVE-2025-13189D-Link DIR-816L gena.cgi genacgi_main stack-based overflow

High 8.8

In plain English

A high-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 1.0% (higher than 62% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.0%top 37.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in D-Link DIR-816L 2_06_b09_beta. This affects the function genacgi_main of the file gena.cgi. The manipulation of the argument SERVER_ID/HTTP_SID leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the 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:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-332478 | D-Link DIR-816L gena.cgi genacgi_main stack-based overflow vdb-entry, technical-description
VDB-332478 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #685540 | 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(gena.cgi).pdf exploit
https://www.dlink.com/ product