Buffer overflow in Tenda Ac1206
CVE-2026-19789
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.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.009 (56.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.009 · change: +0.004
Affected products
- Tenda Ac1206 — versions 15.03.06.23_multi_TD01
Weakness classification (CWE)
References
- vuldb.com/vuln/389756 (technical-description, vdb-entry)
- vuldb.com/vuln/389756/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-19789 (third-party-advisory)
- vuldb.com/submit/868921 (third-party-advisory)
- github.com/lipenghai/iot_bug/blob/main/Tenda/AC12/2.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-19789?
- CVE-2026-19789 is a high-severity vulnerability in Tenda Ac1206, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-08-14.
- How severe is CVE-2026-19789?
- High severity. CVSS v3 base score is 8.8 out of 10.