CVE-2021-28372

Name: CVE-2021-28372
Creator: NVD / NIST
Published: 2021-08-17T22:15:08.053+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.3/10EPSS 2.47%

Last modified Jun 17, 2026

CVE-2021-28372 is a high-severity vulnerability rated 8.3/10 on the CVSS scale. ThroughTek's Kalay Platform 2.0 network allows an attacker to impersonate an arbitrary ThroughTek (TUTK) device given a valid 20-byte uniquely assigned identifier (UID). This could result in an attacker hijacking a victim's connection and forcing them into supplying credentials needed to access the victim TUTK device.. EPSS estimates a 2.47% chance of exploitation in the next 30 days.

Description

ThroughTek's Kalay Platform 2.0 network allows an attacker to impersonate an arbitrary ThroughTek (TUTK) device given a valid 20-byte uniquely assigned identifier (UID). This could result in an attacker hijacking a victim's connection and forcing them into supplying credentials needed to access the victim TUTK device.

Metrics

CVSS 3.1

8.3/10

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

EPSS Probability

2.47%

82.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-290

Affected Software

Vendor	Product	Versions
Throughtek	Kalay P2p Software Development Kit	< 3.1.10

References

https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2021-0020/FEYE-2021-0020.mdMitigation, Third Party Advisory
https://www.fireeye.com/blog/threat-research/2021/08/mandiant-discloses-critical-vulnerability-affecting-iot-devices.htmlExploit, Mitigation, Third Party Advisory
https://www.throughtek.com/kalay_overview.htmlBroken Link, Vendor Advisory
https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2021-0020/FEYE-2021-0020.mdMitigation, Third Party Advisory
https://www.fireeye.com/blog/threat-research/2021/08/mandiant-discloses-critical-vulnerability-affecting-iot-devices.htmlExploit, Mitigation, Third Party Advisory
https://www.throughtek.com/kalay_overview.htmlBroken Link, Vendor Advisory

Timeline

Published: Aug 17, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28372?

How severe is CVE-2021-28372?

CVE-2021-28372 has a CVSS score of 8.3/10 (HIGH severity). The EPSS model estimates a 2.47% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28372?

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-2021-28372?

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

Scan your code now

Source: NVD / NIST