CVE-2022-40068 Memory corruption in n/a
A buffer overflow in the Tenda AC21 router's httpd service allows attackers to execute arbitrary code via the formSetQosBand 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-2022-40068?
CVE-2022-40068 is a high-severity memory corruption vulnerability in n/a, published on 19 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Tenda AC21 V16.03.08.15 is vulnerable to Buffer Overflow via /bin/httpd, function: formSetQosBand.
Weakness: CWE-787
Which versions are affected by CVE-2022-40068?
It affects 1 product.
Products include Tenda Ac21 Firmware.
How do I fix CVE-2022-40068?
No fix has been published for CVE-2022-40068 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-2022-40068 being exploited?
There is no known exploitation of CVE-2022-40068 in the wild and no public exploit code.
Other vulnerabilities in n/a
- 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-3hf9-x4q8-q4gg.