CVE-2025-49464: Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial o

Q: How do I fix CVE-2025-49464?

zoom: upgrade to 6.4.5. Exact commands for each OS are on this page.

Q: Is CVE-2025-49464 being exploited?

CVE-2025-49464 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-49464 affect?

CVE-2025-49464 affects zoom. Severity is medium (CVSS 6.5). Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial of service via network access.

Q: How urgent is CVE-2025-49464?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2025-49464 is a medium-severity flaw (CVSS 6.5) affecting zoom. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised 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 score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-120
Published	2025-07-10
Last modified	2026-06-17

Publisher (CNA): Zoom Video Communications, Inc. · Vendor: zoom

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

Am I affected?

Timeline

2025-07-10 17:15 UTCPublished CVE record published
2026-06-17 09:31 UTCUpdated Record last modified

zoom zoom UPGRADE

Affected: < 6.4.5

Fixed in: 6.4.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy zoom || rpm -q zoom || zoom --version

2. UPGRADE to 6.4.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zoom

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zoom

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2025-49464?

zoom: upgrade to 6.4.5. Exact commands for each OS are on this page.

Is CVE-2025-49464 being exploited?

CVE-2025-49464 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-2025-49464 affect?

CVE-2025-49464 affects zoom. Severity is medium (CVSS 6.5). Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial of service via network access.

How urgent is CVE-2025-49464?

Priority 36/100. No elevated risk signals yet.

Software pages

Windows vulnerabilities · Zoom vulnerabilities

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References

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