CVE-2025-57432: Blackmagic Web Presenter version 3.3 exposes a Telnet service on port 9977 that accepts unauthenticated comman

This week

CRITICAL 9.8REMOTEMITIGATEMITIGATE

CVE-2025-57432 is a critical-severity flaw (CVSS 9.8) affecting web presenter hd firmware, web presenter 4k firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-306
Published	2025-09-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: blackmagicdesign

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-22 16:15 UTCPublished CVE record published
2026-06-17 09:43 UTCUpdated Record last modified

blackmagicdesign web presenter hd firmware MITIGATE

Affected: 3.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

blackmagicdesign web presenter 4k firmware MITIGATE

Affected: 3.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · pipx · FIXED · 1.18.9-1.fc46 · FEDORA-2026-95305954ab · source

sudo dnf upgrade --advisory=FEDORA-2026-95305954ab

Fedora ELN · libisds · FIXED · 0.11.2-19.eln159 · FEDORA-2026-bf61b68668 · source

sudo dnf upgrade --advisory=FEDORA-2026-bf61b68668

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/shiky8/my--cve-vulnerability-research/tree/main/CVE-2025-57432

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-57432?

web presenter hd firmware: mitigate or apply the listed mitigation; web presenter 4k firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-57432 being exploited?

CVE-2025-57432 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-57432 affect?

CVE-2025-57432 affects web presenter hd firmware, web presenter 4k firmware. Severity is critical (CVSS 9.8). 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 devic

How urgent is CVE-2025-57432?

Priority 60/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-57437 CRITICAL 9.8 MITIGATE The Blackmagic Web Presenter HD firmware version 3.3 exposes sensitive information via an unauthenticated Teln

References

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