CVE-2022-43543: Docomo + Message

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

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 (fixed in 3.9.4); before 54.49.0500 (fixed in 54.49.0500)
• Kddi + Message: before 3.9.2 (fixed in 3.9.2); before 3.9.4 (fixed in 3.9.4)
• Softbank + Message: before 3.9.4 (fixed in 3.9.4); before 12.9.5 (fixed in 12.9.5)

Published 2022-12-21. Last modified 2026-06-17.