CVE-2023-6259

Sensitive-data disclosure via physical memory access

Published Feb 19, 2024 · Updated Aug 22, 2024

Improper access control in Brivo ACS100 and ACS300 firmware allows physically proximate attackers to read sensitive data from device memory. Public sources identify the exposed locus only as device memory and do not disclose the interface or operation that leaves credentials insufficiently protected. Physical access to the controller is required, and recovered data can support additional attacks that bypass physical security.

CVSS severity7.1
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Brivo ACS100 and ACS300 firmware allows physically proximate attackers to read sensitive data from device memory. Public sources identify the exposed locus only as device memory and do not disclose the interface or operation that leaves credentials insufficiently protected. Physical access to the controller is required, and recovered data can support additional attacks that bypass physical security.

The record

CVE
CVE-2023-6259
Published
Feb 19, 2024
Updated
Aug 22, 2024
Vendor
Brivo
Product
Brivo ACS100 Firmware
Classifications
CWE-284, CWE-522, CAPEC-50, CAPEC-390
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 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=5.2.4 <6.2.4.3

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Brivo · Brivo ACS100 Firmwareversion=5.2.4 <6.2.4.3
Brivo · Brivo ACS300 Firmwareversion=5.2.4 <6.2.4.3

Published CVSS scores

7.1Security Risk AdvisorsCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
4.6NIST NVDCVSS:3.1/AV:P/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-522Insufficiently Protected Credentials
CAPEC-50Password Recovery Exploitation
CAPEC-390Bypassing Physical Security

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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