CVE-2025-65221 Memory corruption in n/a
A buffer overflow in the Tenda AC21 router allows attackers to execute arbitrary code via the list parameter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-65221?
CVE-2025-65221 is a medium-severity memory corruption vulnerability in n/a, published on 20 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the list parameter of /goform/setPptpUserList.
Weakness: CWE-121
Which versions are affected by CVE-2025-65221?
It affects 1 product.
Products include Tenda Ac21 Firmware.
How do I fix CVE-2025-65221?
No fix has been published for CVE-2025-65221 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-2025-65221 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-65221 exists.
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-prff-37fr-238x.