CVE-2026-23999

Physical unlock via timestamp-derived device PIN

Published Feb 26, 2026 · Updated Feb 26, 2026

Predictable PIN generation in Fleet before 4.80.1 allows physically proximate attackers to unlock managed Apple devices. GenerateRandomPin in server/mdm/apple/util.go hashes the current Unix timestamp alone and truncates the result to six decimal digits. Exploitation requires physical possession, approximate lock time, and overcoming OS rate limits; it does not expose the Fleet control plane.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable PIN generation in Fleet before 4.80.1 allows physically proximate attackers to unlock managed Apple devices. GenerateRandomPin in server/mdm/apple/util.go hashes the current Unix timestamp alone and truncates the result to six decimal digits. Exploitation requires physical possession, approximate lock time, and overcoming OS rate limits; it does not expose the Fleet control plane.

The record

CVE
CVE-2026-23999
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Fleet Device Management
Product
Fleet
Classifications
CWE-330, T1110
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 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=< 4.80.1

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Fleet Device Management · Fleetversion=< 4.80.1

Published CVSS scores

0.6GitHub, Inc.CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
5.5NIST NVDCVSS: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-330Use of Insufficiently Random Values
T1110Brute Force

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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