CVE-2026-8263 is a medium severity (4.7) OS command injection in the httpd component of Tenda AC6 firmware 15.03.06.49_multi_TDE01. The record says a public exploit exists and the attack can start remotely, though it requires high privileges. I could not confirm a fixed firmware, so check Tenda's support site.
What's affected
The record describes Tenda AC6 firmware 15.03.06.49_multi_TDE01, and its product list also names the AC10U. The vulnerable function is fromSetWirelessRepeat for the path /goform/WifiExtraSet in the httpd component. The mac and ssid arguments are the ones involved.
The record gives no fixed version and I did not confirm one. Treat every device on that firmware as affected until Tenda says otherwise.
How to check if you're exposed
Open your router's admin page and read the firmware version on the status or system page. Compare it to 15.03.06.49_multi_TDE01. Check Tenda's support downloads for a newer build for your exact model.
Also check whether the admin interface is reachable from the internet, which it should not be.
What to do now
- Identify Tenda AC6 and AC10U devices and their firmware versions.
- Check Tenda's support site for a firmware release that fixes this and apply it if one exists.
- Make sure the admin interface is not exposed to the internet and is reachable only from your trusted network.
- Change the admin password to a strong unique value, since the attack needs high privileges.
- If the model is no longer supported, plan to replace it.
Why it matters
The record lists CWE-77 and CWE-78, command injection and OS command injection, along with CWE-787, out of bounds write. Input from a web form reaches a command or buffer without proper handling.
The score is medium because the vector requires high privileges, meaning an admin login. That narrows the risk but does not remove it, since many routers keep default or weak admin passwords. The record says the exploit is public. It is not listed in CISA's KEV catalog, and I do not know whether it has been used.
Consumer and small office routers raise a problem that enterprise software does not. Firmware updates may be late, rare or absent, and the model may be out of support. Before you spend time on this one, check whether Tenda lists a fix for your exact model. If none exists, the practical mitigation is exposure control and replacement.
The record says the attack requires a high privilege level. For a router, that means the admin interface. Check that remote administration is off, that the admin page is not reachable from the internet, and that the admin password is not a default.
The public exploit note in the record matters for one reason. It means anyone scanning for these devices can attempt the call. Even with a medium score, exposed devices are at the top of a scanner's list. Taking the admin interface off the internet removes that audience.
Quick check
Why is a command injection only rated 4.7?
Because the vector requires high privileges. The attacker needs admin access first.
Sources
- Write-up referenced by the record (not read for this post)
- VulDB entry referenced by the record (not read for this post)
Last reviewed: 19 October 2026.
