CVE-2021-30480: Zoom Chat through 2021-04-09 on Windows and macOS allows certain remote authenticated attackers to execute arb

Q: How do I fix CVE-2021-30480?

chat: upgrade to newer than 2021-04-09. Exact commands for each OS are on this page.

Q: Is CVE-2021-30480 being exploited?

CVE-2021-30480 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-2021-30480 affect?

CVE-2021-30480 affects chat. Severity is high (CVSS 8.5). Zoom Chat through 2021-04-09 on Windows and macOS allows certain remote authenticated attackers to execute arbitrary code without user interaction. An attacker must be within the same organization, or an external party who has been accepted

Q: How urgent is CVE-2021-30480?

Priority 58/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

This month

HIGH 8.5UPGRADE

CVE-2021-30480 is a high-severity flaw (CVSS 8.5) affecting chat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Zoom Chat through 2021-04-09 on Windows and macOS allows certain remote authenticated attackers to execute arbitrary code without user interaction. An attacker must be within the same organization, or an external party who has been accepted as a contact. NOTE: this is specific to the Zoom Chat software, which is different from the chat feature of the Zoom Meetings and Zoom Video Webinars software.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	7.2% (top 6%)
CISA exploited list	No
Published	2021-04-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zoom

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

Am I affected?

Timeline

2021-04-09 23:15 UTCPublished CVE record published
2026-06-17 03:50 UTCUpdated Record last modified

zoom chat UPGRADE

Affected: <= 2021-04-09

Fixed in: newer than 2021-04-09

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2021-04-09 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chat

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-2021-30480?

chat: upgrade to newer than 2021-04-09. Exact commands for each OS are on this page.

Is CVE-2021-30480 being exploited?

CVE-2021-30480 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-2021-30480 affect?

CVE-2021-30480 affects chat. Severity is high (CVSS 8.5). Zoom Chat through 2021-04-09 on Windows and macOS allows certain remote authenticated attackers to execute arbitrary code without user interaction. An attacker must be within the same organization, or an external party who has been accepted

How urgent is CVE-2021-30480?

Priority 58/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

Software pages

Windows vulnerabilities · macOS vulnerabilities · Zoom vulnerabilities

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CVE-2020-36625 MEDIUM 4.3 MITIGATE A vulnerability was found in destiny.gg chat
CVE-2020-15948 MEDIUM 6.1 DOWNGRADE eGain Chat 15.5.5 allows XSS via the Name (aka full_name) field.

References

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