CVE-2021-4465 ReQuest Serious Play F3 Media Server <= 7.0.3 Remote DoS
Unauthenticated attackers can remotely shut down or reboot the media server via a crafted HTTP request, causing service disruption.
- 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-2021-4465?
CVE-2021-4465 is a high-severity denial of service vulnerability in ReQuest Serious Play, published on 14 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ReQuest Serious Play F3 Media Server versions 7.0.3.4968 (Pro), 7.0.2.4954, 6.5.2.4954, 6.4.2.4681, 6.3.2.4203, and 2.0.1.823 contain a remote denial-of-service vulnerability. The device can be shut down or rebooted by an unauthenticated attacker through a single crafted HTTP GET request, allowing remote interruption of service availability.
Weakness: CWE-400
Which versions are affected by CVE-2021-4465?
How do I fix CVE-2021-4465?
No fix has been published for CVE-2021-4465 yet. Limit exposure of the affected software until one is available.
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-2021-4465 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-4465 exists.
Sources
Also known as GHSA-m5xx-7q4g-9wfx.