CVE-2026-2147 Tenda AC21 Web Management DownloadLog information disclosure
Remote attackers can access sensitive log data via the DownloadLog interface in Tenda AC21 routers, potentially exposing system information.
- 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-2026-2147?
CVE-2026-2147 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 weakness has been identified in Tenda AC21 16.03.08.16. This impacts an unknown function of the file /cgi-bin/DownloadLog of the component Web Management Interface. Executing a manipulation can lead to information disclosure. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.
Which versions are affected by CVE-2026-2147?
It affects 1 product.
Products include Tenda Ac21 Firmware.
How do I fix CVE-2026-2147?
No fix has been published for CVE-2026-2147 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-2147 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2147 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-qg34-2w8p-vh8q.