CVE-2026-86300 Tenda AC9 Web Management R7WebsSecurityHandler improper authentication
Remote attackers can bypass authentication in the Tenda AC9 router's web management interface via the R7WebsSecurityHandler function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86300?
CVE-2026-86300 is a medium-severity authentication bypass vulnerability in Tenda AC9, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-287
Which versions are affected by CVE-2026-86300?
How do I fix CVE-2026-86300?
No fix has been published for CVE-2026-86300 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-86300 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86300 exists.
Sources
Also known as GHSA-j3cm-vx4c-h779.