CVE-2021-25437

Name: CVE-2021-25437
Creator: NVD / NIST
Published: 2021-07-08T14:15:08.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.35%

Last modified Jun 17, 2026

CVE-2021-25437 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Improper access control vulnerability in Tizen FOTA service prior to Firmware update JUL-2021 Release allows attackers to arbitrary code execution by replacing FOTA update file.. EPSS estimates a 2.35% chance of exploitation in the next 30 days.

Description

Improper access control vulnerability in Tizen FOTA service prior to Firmware update JUL-2021 Release allows attackers to arbitrary code execution by replacing FOTA update file.

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

2.35%

81.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Linux	Tizen	< 5.5

References

https://security.samsungmobile.com/serviceWeb.smsb?year=2021&month=7Vendor Advisory
https://security.samsungmobile.com/serviceWeb.smsb?year=2021&month=7Vendor Advisory

Timeline

Published: Jul 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25437?

Improper access control vulnerability in Tizen FOTA service prior to Firmware update JUL-2021 Release allows attackers to arbitrary code execution by replacing FOTA update file.

How severe is CVE-2021-25437?

CVE-2021-25437 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.35% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25437?

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-2021-25437?

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

Scan your code now

Source: NVD / NIST