CVE-2026-43665

Legacy VNC password disclosure via missing entitlement checks

Published Jul 27, 2026 · Updated Jul 27, 2026

Missing authorization in Apple macOS Sonoma before 14.8.8 and Sequoia before 15.7.8 allows local users to read a legacy VNC password. Screen Sharing Server applies insufficient entitlement checks when a local caller requests the configured legacy VNC credential. A low-privileged local account is required, and disclosure is limited to systems where Screen Sharing has a legacy VNC password configured.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Apple macOS Sonoma before 14.8.8 and Sequoia before 15.7.8 allows local users to read a legacy VNC password. Screen Sharing Server applies insufficient entitlement checks when a local caller requests the configured legacy VNC credential. A low-privileged local account is required, and disclosure is limited to systems where Screen Sharing has a legacy VNC password configured.

The record

CVE
CVE-2026-43665
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-862, T1555
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <14.8.8
  2. Affected versionversion=0 <15.7.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Apple · macOSversion=0 <14.8.8; version=0 <15.7.8

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1555Credentials from Password Stores

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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