CVE-2023-23300

Name: CVE-2023-23300
Creator: NVD / NIST
Published: 2023-05-23T20:15:09.38+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.27%

Last modified Jun 17, 2026

CVE-2023-23300 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7 does not validate its parameters, which can result in buffer overflows when copying data. A malicious application could call the API method with specially crafted parameters and hijack the execution of the device's firmware.. EPSS estimates a 1.27% chance of exploitation in the next 30 days.

Description

The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7 does not validate its parameters, which can result in buffer overflows when copying data. A malicious application could call the API method with specially crafted parameters and hijack the execution of the device's firmware.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.27%

66.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Garmin	Connect-Iq	>= 3.0.0, <= 4.1.7

References

Timeline

Published: May 23, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-23300?

How severe is CVE-2023-23300?

CVE-2023-23300 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.27% probability of exploitation in the next 30 days.

How do I fix CVE-2023-23300?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-23300?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST