CVE-2022-43543

MEDIUM

5.4

CVSS Score

Published: December 21, 2022 at 12:00 AM UTC

Updated: June 17, 2026 at 05:06 AM UTC

6 products affected across 4 vendors+ Message+ Message+ Message

Using KDDI +Message App for Android and for iOS, NTT DOCOMO +Message App for Android and for iOS, and SoftBank +Message App for Android and for iOS by KDDI CORPORATION, NTT DOCOMO, INC., and SoftBank Corp.?

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Severity

MEDIUM5.4

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

+ Message · Docomo

95%

v < 3.9.4v < 54.49.0500

Affected range stops below 3.9.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 54.49.0500, so it looks safe — our inference, not a vendor statement

+ Message · Kddi

95%

v < 3.9.2v < 3.9.4

Affected range stops below 3.9.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.9.4, so it looks safe — our inference, not a vendor statement

+ Message · Softbank

95%

v < 12.9.5v < 3.9.4

Affected range stops below 12.9.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.9.4, so it looks safe — our inference, not a vendor statement

Kddi Plus Message · Kddi Ntt Docomo and Softbank

60%

v < 3.9.2

Affected range stops below 3.9.2, so it looks safe — our inference, not a vendor statement

Ntt Docomo Plus Message · Kddi Ntt Docomo and Softbank

60%

v < 3.9.2

Affected range stops below 3.9.2, so it looks safe — our inference, not a vendor statement

Softbank Plus Message · Kddi Ntt Docomo and Softbank

60%

v < 3.9.2

Affected range stops below 3.9.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

Third Party Advisory

Source: [email protected]

https://jvn.jp/en/jp/JVN43561812/index.html

Vendor Advisory

Source: [email protected]

https://www.au.com/mobile/service/plus-message/information/

Vendor Advisory

Source: [email protected]

https://www.docomo.ne.jp/service/plus_message/

Vendor Advisory

Source: [email protected]

https://www.softbank.jp/mobile/service/plus-message/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-OtherCWE-116

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