CVE-2025-57432Public exploitNetwork attack vector

Stream manipulation via unauthenticated Telnet commands

Published Sep 22, 2025 · Updated Sep 23, 2025

Missing authentication in Blackmagic Web Presenter 3.3 allows remote attackers to alter stream settings through its Telnet service. The device exposes a command interface on TCP port 9977 that accepts stream-control commands without requesting credentials or validating a session. Any remote attacker with network reachability to that port can change video modes and other device functions, disrupting or redirecting a live stream.

CVSS severity9.8
Critical
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Blackmagic Web Presenter 3.3 allows remote attackers to alter stream settings through its Telnet service. The device exposes a command interface on TCP port 9977 that accepts stream-control commands without requesting credentials or validating a session. Any remote attacker with network reachability to that port can change video modes and other device functions, disrupting or redirecting a live stream.

The record

CVE
CVE-2025-57432
Published
Sep 22, 2025
Updated
Sep 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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