CVE-2023-5553

Physical Secure Boot bypass through firmware downgrade

Published Nov 21, 2023 · Updated Jun 10, 2025

Secure Boot bypass in Axis Communications AB AXIS OS 10.8 through 11.6 allows physically proximate attackers to bypass device-tampering protection. The flaw permits a firmware downgrade past Secure Boot protections, but Axis intentionally withholds the underlying mechanism for security reasons. Exploitation requires physical access to an ARTPEC 8 device and can compromise firmware confidentiality, integrity, and availability.

CVSS severity7.6
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Secure Boot bypass in Axis Communications AB AXIS OS 10.8 through 11.6 allows physically proximate attackers to bypass device-tampering protection. The flaw permits a firmware downgrade past Secure Boot protections, but Axis intentionally withholds the underlying mechanism for security reasons. Exploitation requires physical access to an ARTPEC 8 device and can compromise firmware confidentiality, integrity, and availability.

The record

CVE
CVE-2023-5553
Published
Nov 21, 2023
Updated
Jun 10, 2025
Vendor
Axis Communications AB
Product
AXIS OS
Classifications
CWE-863, T1601.002
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2025Record 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=10.8 <=11.6
  2. Affected versionversion=AXIS OS 10.8 - 11.6

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Axis Communications AB · AXIS OSversion=10.8 <=11.6; version=AXIS OS 10.8 - 11.6

Published CVSS scores

7.6Axis Communications ABCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
6.8NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/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.

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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-863Incorrect Authorization
T1601.002Downgrade System Image

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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