CVE-2025-7911: D-Link DI-8100 jhttpd upnp_ctrl.asp sprintf stack-based overflow

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-20 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability classified as critical was found in D-Link DI-8100 1.0. This vulnerability affects the function sprintf of the file /upnp_ctrl.asp of the component jhttpd. The manipulation of the argument remove_ext_proto/remove_ext_port leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products

D-Link DI-8100: 1.0

References

https://github.com/buobo/bo-s-CVE/blob/main/DI-8100/upnp_ctrl_asp.md
https://vuldb.com/?ctiid.317026
https://vuldb.com/?id.317026
https://vuldb.com/?submit.618640
https://vuldb.com/?submit.618641
https://www.dlink.com/
https://github.com/buobo/bo-s-CVE/blob/main/DI-8100/upnp_ctrl_asp.md

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