CVE-2025-9783 TOTOLINK A702R formParentControl sub_418030 buffer overflow
Remote attackers can trigger a buffer overflow in the TOTOLINK A702R router via the formParentControl interface, 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-2025-9783?
CVE-2025-9783 is a high-severity memory corruption vulnerability in TOTOLINK A702R, published on 1 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was determined in TOTOLINK A702R 4.0.0-B20211108.1423. This issue affects the function sub_418030 of the file /boafrm/formParentControl. Executing manipulation of the argument submit-url can lead to buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
Which versions are affected by CVE-2025-9783?
It affects 1 product.
Products include Totolink A702r Firmware.
How do I fix CVE-2025-9783?
No fix has been published for CVE-2025-9783 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-2025-9783 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9783 exists.
Other vulnerabilities in TOTOLINK A702R
- CVE-2025-9779 TOTOLINK A702R formFilter sub_4162DC buffer overflow
- CVE-2025-9780 TOTOLINK A702R formIpQoS sub_419BE0 buffer overflow
- CVE-2025-9781 TOTOLINK A702R formFilter sub_4162DC buffer overflow
- CVE-2025-9782 TOTOLINK A702R formOneKeyAccessButton sub_4466F8 buffer overflow
- CVE-2025-8136 TOTOLINK A702R HTTP POST Request formFilter buffer overflow
Sources
Also known as GHSA-xj6h-q5c9-g8r3.