CVE-2026-4974 Tenda AC7 POST Request SetSysTimeCfg fromSetSysTime memory corruption
Remote attackers can trigger a stack-based buffer overflow in the Tenda AC7 router via a crafted POST request, potentially leading to code execution or service disruption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4974?
CVE-2026-4974 is a high-severity memory corruption vulnerability in Tenda Ac7 Firmware, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw has been found in Tenda AC7 15.03.06.44. Affected by this issue is the function fromSetSysTime of the file /goform/SetSysTimeCfg of the component POST Request Handler. Executing a manipulation of the argument Time can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.
Which versions are affected by CVE-2026-4974?
It affects 1 product.
Products include Tenda Ac7 Firmware.
How do I fix CVE-2026-4974?
No fix has been published for CVE-2026-4974 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-4974 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4974 exists.
Other vulnerabilities in Tenda Ac7 Firmware
Sources
Also known as GHSA-m2mh-w42r-cfwf.