CVE-2023-21443

Name: CVE-2023-21443
Creator: NVD / NIST
Published: 2023-02-09T19:15:16.593+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.19%

Last modified Jun 17, 2026

CVE-2023-21443 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Improper cryptographic implementation in Samsung Flow for Android prior to version 4.9.04 allows adjacent attackers to decrypt encrypted messages or inject commands.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

Description

Improper cryptographic implementation in Samsung Flow for Android prior to version 4.9.04 allows adjacent attackers to decrypt encrypted messages or inject commands.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.19%

9.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Samsung	Flow	< 4.9.04

References

https://security.samsungmobile.com/serviceWeb.smsb?year=2023&month=02Vendor Advisory
https://security.samsungmobile.com/serviceWeb.smsb?year=2023&month=02Vendor Advisory

Timeline

Published: Feb 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-21443?

Improper cryptographic implementation in Samsung Flow for Android prior to version 4.9.04 allows adjacent attackers to decrypt encrypted messages or inject commands.

How severe is CVE-2023-21443?

CVE-2023-21443 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21443?

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-2023-21443?

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

Scan your code now

Source: NVD / NIST