CVE-2026-2148 Tenda AC21 Web Management DownloadFlash information disclosure
Remote attackers can access sensitive information via the DownloadFlash endpoint in the Tenda AC21 web management interface.
- 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-2026-2148?
CVE-2026-2148 is a medium-severity vulnerability in Tenda AC21, published on 8 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security vulnerability has been detected in Tenda AC21 16.03.08.16. Affected is an unknown function of the file /cgi-bin/DownloadFlash of the component Web Management Interface. The manipulation leads to information disclosure. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.
Which versions are affected by CVE-2026-2148?
It affects 1 product.
Products include Tenda Ac21 Firmware.
How do I fix CVE-2026-2148?
No fix has been published for CVE-2026-2148 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-2148 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2148 exists.
Other vulnerabilities in Tenda AC21
- CVE-2025-9605 Tenda AC21/AC23 GetParentControlInfo stack-based overflow
- CVE-2023-24333 Command injection in n/a
- CVE-2026-4565 Tenda AC21 SetNetControlList formSetQosBand buffer overflow
- CVE-2026-1637 Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow
- CVE-2025-13445 Tenda AC21 SetIpMacBind stack-based overflow
Sources
Also known as GHSA-jp5v-2v6v-3w4h.