CVE-2023-23119Network attack vector

Firmware modification via forgeable CRC integrity check

Published Feb 2, 2023 · Updated Mar 26, 2025

Firmware integrity failure in Ubiquiti airFiber AF2X Radio 3.2.2 and earlier allows man-in-the-middle attackers to install modified firmware. The firmware updater treats a CRC checksum as proof of authenticity, so an interceptor can alter an image and recompute the checksum without detection. Exploitation requires control of the firmware-download path and compromises the integrity of code installed on the radio.

CVSS severity5.9
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Firmware integrity failure in Ubiquiti airFiber AF2X Radio 3.2.2 and earlier allows man-in-the-middle attackers to install modified firmware. The firmware updater treats a CRC checksum as proof of authenticity, so an interceptor can alter an image and recompute the checksum without detection. Exploitation requires control of the firmware-download path and compromises the integrity of code installed on the radio.

The record

CVE
CVE-2023-23119
Published
Feb 2, 2023
Updated
Mar 26, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-354, CAPEC-145, T1601.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.9CISACVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-354Improper Validation of Integrity Check Value
CAPEC-145Checksum Spoofing
T1601.001Patch System Image

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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