Auth bypass in Tenda Ac9
CVE-2026-86300
A flaw has been found in Tenda AC9 15.03.05.14. This impacts the function R7WebsSecurityHandler of the component Web Management. This manipulation causes improper authentication. The attack may be initiated remotely. The exploit has been published and may be used.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.008 (57.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.5% 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: 0.008 · change: +0.004
Affected products
- Tenda Ac9 — versions 15.03.05.14
Weakness classification (CWE)
References
- vuldb.com/vuln/399464 (technical-description, vdb-entry)
- vuldb.com/vuln/399464/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-86300 (third-party-advisory)
- vuldb.com/submit/906606 (third-party-advisory)
- vuldb.com/submit/906607 (third-party-advisory)
- vuldb.com/submit/906608 (third-party-advisory)
- github.com/limou89/somevul/blob/main/Tenda_AC9_getProduct_Info_Disclosure.md (related)
- github.com/limou89/somevul/blob/main/Tenda_AC9_fast_setting_wifi_set_Unauth_Pas… (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-86300?
- CVE-2026-86300 is a high-severity vulnerability in Tenda Ac9, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-09-07.
- How severe is CVE-2026-86300?
- High severity. CVSS v3 base score is 7.3 out of 10.