CVE-2026-20699

Local data disclosure via code-signing downgrade

Published Mar 25, 2026 · Updated Mar 25, 2026

Information disclosure in Apple macOS on Intel-based Macs allows local users to access user-sensitive data through a malicious app. Apple identifies Spotlight and AppleMobileFileIntegrity but has not disclosed the exact downgrade operation that insufficiently enforced code-signing restrictions. Exploitation requires running an app locally on an Intel-based Mac; the reported consequence is data access without integrity or availability impact.

CVSS severity6.2
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Apple macOS on Intel-based Macs allows local users to access user-sensitive data through a malicious app. Apple identifies Spotlight and AppleMobileFileIntegrity but has not disclosed the exact downgrade operation that insufficiently enforced code-signing restrictions. Exploitation requires running an app locally on an Intel-based Mac; the reported consequence is data access without integrity or availability impact.

The record

CVE
CVE-2026-20699
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-347, T1553.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2026Record 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=0 <14.8.5
  2. Affected versionversion=0 <15.7.5
  3. Affected versionversion=0 <26.3
  4. Affected versionversion=0 <26.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=0 <14.8.5; version=0 <15.7.5; version=0 <26.3; version=0 <26.4

Published CVSS scores

6.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1553.002Subvert Trust Controls: Code Signing

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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