CVE-2025-31718 Denial of service in T606/T612/T616/T750/T765/T760/T770/T820/S8000/T8300/T9300
Remote attackers can cause a system crash and escalate privileges in Unisoc modem firmware due to improper input validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-31718?
CVE-2025-31718 is a high-severity denial of service vulnerability in Unisoc (Shanghai) Technologies Co., Ltd. T606/T612/T616/T750/T765/T760/T770/T820/S8000/T8300/T9300, published on 11 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In modem, there is a possible system crash due to improper input validation. This could lead to remote escalation of privilege with no additional execution privileges needed.
Which versions are affected by CVE-2025-31718?
How do I fix CVE-2025-31718?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-31718 being exploited?
There is no known exploitation of CVE-2025-31718 in the wild and no public exploit code.
Sources
Also known as A-435076697, ASB-A-435076697, GHSA-rcvr-p8xm-j6hr, U-3037571.