CVE-2025-57432: Blackmagic Web Presenter · Missing Authentication
Source CVE Database V5
Not known to be exploited · CVSS 9.8 Critical.
Data as of 26 Oct 2026, 12:55 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 50% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Immediate mitigation steps include isolating Blackmagic Web Presenter devices from untrusted networks, especially the internet, to prevent unauthorized remote access to the Telnet service. Network segmentation should be employed to restrict access to port 9977 only to trusted management stations within secure internal networks. Organizations should monitor network traffic for unusual connections to this port and implement firewall rules to block unauthorized access. Since no patches are currently available, consider disabling the Telnet service if the device firmware or configuration allows it, or replacing the device with a more secure alternative if feasible. Regularly audit device configurations and logs for signs of unauthorized access or configuration changes. Additionally, implement strict physical security controls to prevent local exploitation. Organizations should also engage with Blackmagic Design for updates or firmware patches and subscribe to vulnerability advisories to apply fixes promptly once available. Finally, incorporate this vulnerability into incident response plans to ensure rapid containment and remediation if exploitation is detected.
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.