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CVE-2025-30666: NULL pointer dereference in some Zoom Workplace Apps for Windows may allow an authenticated user to conduct a

34
Routine
MEDIUM 6.5UPGRADEUPGRADEUPGRADE

CVE-2025-30666 is a medium-severity flaw (CVSS 6.5) affecting meeting software development kit, rooms, rooms controller. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NULL pointer dereference in some Zoom Workplace Apps for Windows may allow an authenticated user to conduct a denial of service via network access.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score6.5 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.6% (top 54%)
CISA exploited listNo
WeaknessCWE-476
Published2025-05-14
Last modified2026-06-17
Publisher (CNA): Zoom Video Communications, Inc. · Vendor: zoom

Share: LinkedIn · X · Reddit

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

Am I affected?

Timeline

zoom meeting software development kit UPGRADE
Affected: < 6.4.0
Fixed in: 6.4.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy meeting-software-development-kit || rpm -q meeting-software-development-kit || meeting-software-development-kit --version
2. UPGRADE to 6.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade meeting-software-development-kit
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade meeting-software-development-kit
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
zoom rooms UPGRADE
Affected: < 6.4.0
Fixed in: 6.4.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy rooms || rpm -q rooms || rooms --version
2. UPGRADE to 6.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade rooms
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade rooms
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
zoom rooms controller UPGRADE
Affected: < 6.4.0
Fixed in: 6.4.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy rooms-controller || rpm -q rooms-controller || rooms-controller --version
2. UPGRADE to 6.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade rooms-controller
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade rooms-controller
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
zoom workplace desktop UPGRADE
Affected: < 6.4.0
Fixed in: 6.4.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy workplace-desktop || rpm -q workplace-desktop || workplace-desktop --version
2. UPGRADE to 6.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade workplace-desktop
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade workplace-desktop
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
zoom workplace virtual desktop infrastructure UPGRADE
Affected: < 6.1.17 · >= 6.1.18 and < 6.2.13 · >= 6.2.14 and < 6.3.10
Fixed in: 6.1.17, 6.2.13, 6.3.10
Safe to downgrade to: a release before 6.1.18
1. Check installed version
apt-cache policy workplace-virtual-desktop-infrastructure || rpm -q workplace-virtual-desktop-infrastructure || workplace-virtual-desktop-infrastructure --version
2. UPGRADE to 6.1.17 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade workplace-virtual-desktop-infrastructure
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade workplace-virtual-desktop-infrastructure
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 6.1.18 (Debian / Ubuntu)
apt-cache madison workplace-virtual-desktop-infrastructure sudo apt install workplace-virtual-desktop-infrastructure=<VERSION_BEFORE_6.1.18> sudo apt-mark hold workplace-virtual-desktop-infrastructure
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list workplace-virtual-desktop-infrastructure sudo dnf downgrade workplace-virtual-desktop-infrastructure-<VERSION_BEFORE_6.1.18> sudo dnf versionlock add workplace-virtual-desktop-infrastructure
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
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-2025-30666?

meeting software development kit: upgrade to 6.4.0; rooms: upgrade to 6.4.0; rooms controller: upgrade to 6.4.0. Exact commands for each OS are on this page.

Is CVE-2025-30666 being exploited?

CVE-2025-30666 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-2025-30666 affect?

CVE-2025-30666 affects meeting software development kit, rooms, rooms controller. Severity is medium (CVSS 6.5). NULL pointer dereference in some Zoom Workplace Apps for Windows may allow an authenticated user to conduct a denial of service via network access.

How urgent is CVE-2025-30666?

Priority 34/100. No elevated risk signals yet.

Software pages

Windows vulnerabilities · Zoom vulnerabilities

Related CVEs

References

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