CVE-2022-43543

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-21 · updated 2026-06-17
Weakness: CWE-116

Description

KDDI +Message App, NTT DOCOMO +Message App, and SoftBank +Message App contain a vulnerability caused by improper handling of Unicode control characters. +Message App displays text unprocessed, even when control characters are contained, and the text is shown based on Unicode control character's specifications. Therefore, a crafted text may display misleading web links. As a result, a spoofed URL may be displayed and phishing attacks may be conducted. Affected products and versions are as follows: KDDI +Message App for Android prior to version 3.9.2 and +Message App for iOS prior to version 3.9.4, NTT DOCOMO +Message App for Android prior to version 54.49.0500 and +Message App for iOS prior to version 3.9.4, and SoftBank +Message App for Android prior to version 12.9.5 and +Message App for iOS prior to version 3.9.4

Affected products

Docomo + Message: before 3.9.4; before 54.49.0500 — fixed in 3.9.4, 54.49.0500
Kddi + Message: before 3.9.2; before 3.9.4 — fixed in 3.9.2, 3.9.4
SoftBank + Message: before 3.9.4; before 12.9.5 — fixed in 12.9.5, 3.9.4

How to fix

Upgrade to a fixed version: Docomo + Message 3.9.4, 54.49.0500; Kddi + Message 3.9.2, 3.9.4; SoftBank + Message 12.9.5, 3.9.4. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2022-43543 or the next vulnerability affects your stack