CVE-2025-7921 ASKEY｜modem - Stack-based Buffer Overflow
Unauthenticated remote attackers can execute arbitrary code on ASKEY modems via a stack-based buffer overflow vulnerability.
- 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-2025-7921?
CVE-2025-7921 is a critical memory corruption vulnerability in ASKEY RTF8207w, published on 21 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Certain modem models developed by Askey has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and potentially execute arbitrary code.
Weakness: CWE-121
Which versions are affected by CVE-2025-7921?
How do I fix CVE-2025-7921?
No fix has been published for CVE-2025-7921 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-2025-7921 being exploited?
There is no known exploitation of CVE-2025-7921 in the wild and no public exploit code.
Sources
Also known as GHSA-r7rh-8pmr-qq23.