Buffer overflow in D-link Di-8100
CVE-2025-7911
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 l…
Vulnerability class: Buffer Overflow
EPSS: 0.009 (75.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). 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.
Affected products
- D-link Di-8100 — versions 1.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- VDB-317026 | D-Link DI-8100 jhttpd upnp_ctrl.asp sprintf stack-based overflow (vdb-entry, technical-description)
- VDB-317026 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #618640 | D-Link DI-8100 V1.0 buf (third-party-advisory)
- Submit #618641 | D-Link DI-8100 V1.0 Buffer Overflow (Duplicate) (third-party-advisory)
- github.com/buobo/bo-s-CVE/blob/main/DI-8100/upnp_ctrl_asp.md (exploit)
- www.dlink.com/ (product)
Frequently asked questions
- What is CVE-2025-7911?
- CVE-2025-7911 is a high-severity vulnerability in D-link Di-8100, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-07-20.
- How severe is CVE-2025-7911?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-7911 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.