What’s Vulnerable › Vulnerabilities

CVE-2023-23119

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-02-02 · updated 2026-06-17
• Weakness: CWE-354

Description

The use of the cyclic redundancy check (CRC) algorithm for integrity check during firmware update makes Ubiquiti airFiber AF2X Radio firmware version 3.2.2 and earlier vulnerable to firmware modification attacks. An attacker can conduct a man-in-the-middle (MITM) attack to modify the new firmware image and bypass the checksum verification.

Affected products

• Ui Af-2X Firmware: before 3.2.2 — fixed in 3.2.2

How to fix

Upgrade to a fixed version: Ui Af-2X Firmware 3.2.2. Check the vendor advisory for mitigations.

References

• https://community.ui.com/tags/security/releases
• https://hackmd.io/%40slASVrz_SrW7NQCsunofeA/SkYce4f5o
• https://community.ui.com/tags/security/releases
• https://hackmd.io/%40slASVrz_SrW7NQCsunofeA/SkYce4f5o

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