CVE-2022-28751Public exploit

Root privilege escalation via filename-based signature bypass

Published Aug 17, 2022 · Updated Sep 16, 2024

Improper package signature validation in Zoom Client for Meetings for macOS before 5.11.3 allows local users to gain root privileges. The privileged updater searches all pkgutil output for expected signer strings, allowing package-name content to satisfy the check instead of validating the certificate chain. Low-privileged local access is sufficient to make an accepted package execute as root.

CVSS severity8.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper package signature validation in Zoom Client for Meetings for macOS before 5.11.3 allows local users to gain root privileges. The privileged updater searches all pkgutil output for expected signer strings, allowing package-name content to satisfy the check instead of validating the certificate chain. Low-privileged local access is sufficient to make an accepted package execute as root.

The record

CVE
CVE-2022-28751
Published
Aug 17, 2022
Updated
Sep 16, 2024
Vendor
Zoom Video Communications, Inc.
Product
Zoom Client for Meetings for MacOS
Classifications
CWE-347, CAPEC-475, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <5.11.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Client for Meetings for MacOSversion=unspecified <5.11.3

Published CVSS scores

8.8Zoom Video Communications, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
CAPEC-475Signature Spoofing by Improper Validation
T1068Exploitation for Privilege Escalation

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo