CVE-2025-57432 Missing authorization in n/a
Remote attackers can manipulate stream settings and device functionality via an unauthenticated Telnet service on the Blackmagic Web Presenter.
- 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-2025-57432?
CVE-2025-57432 is a critical missing authorization vulnerability in n/a, published on 22 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Blackmagic Web Presenter version 3.3 exposes a Telnet service on port 9977 that accepts unauthenticated commands. This service allows remote attackers to manipulate stream settings, including changing video modes and possibly altering device functionality. No credentials or authentication mechanisms are required to interact with the Telnet interface.
Weakness: CWE-306
Which versions are affected by CVE-2025-57432?
It affects 2 products.
Products include Blackmagicdesign Web Presenter 4k Firmware, Blackmagicdesign Web Presenter Hd Firmware.
How do I fix CVE-2025-57432?
No fix has been published for CVE-2025-57432 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-57432 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-57432 exists.
Sources
Also known as GHSA-8c8w-8hrx-cvpq.