Blackmagic Web Presenter version 3.3 exposes a Telnet service on port 9977 that accepts unauthenticated commands.

published 2025-09-22 last yr. modified 2026-11-05 4d ago also EUVD-2025-30818

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits: 0; none known

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.

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CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: last yr. (2025-09-23)

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

github.com https://github.com/shiky8/my--cve-vulnerability-research/tree/main/CVE-2025-57432 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

github.com /shiky8/my--cve-vulnerability-research/tree/main/CVE-2025-57432
exploit, third-party-advisory
blackmagicdesign.com /
product

Sources

CVE List CVE-2025-57432
NVD CVE-2025-57432

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