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CVE-2022-43543: KDDI +Message App, NTT DOCOMO +Message App, and SoftBank +Message App contain a vulnerability caused by improp

30
Routine
MEDIUM 5.4UPGRADEUPGRADEUPGRADE

CVE-2022-43543 is a medium-severity flaw (CVSS 5.4) affecting \+ message, \+ message, \+ message. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 conduc

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score5.4 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance0.5% (top 56%)
CISA exploited listNo
WeaknessCWE-116
Published2022-12-21
Last modified2026-06-17
Publisher (CNA): JPCERT/CC · Vendor: docomo · kddi · softbank

Share: LinkedIn · X · Reddit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

docomo \+ message UPGRADE
Affected: < 3.9.4
Fixed in: 3.9.4
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy +-message || rpm -q +-message || +-message --version
2. UPGRADE to 3.9.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade +-message
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade +-message
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
docomo \+ message UPGRADE
Affected: < 54.49.0500
Fixed in: 54.49.0500
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy +-message || rpm -q +-message || +-message --version
2. UPGRADE to 54.49.0500 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade +-message
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade +-message
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
kddi \+ message UPGRADE
Affected: < 3.9.2
Fixed in: 3.9.2
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy +-message || rpm -q +-message || +-message --version
2. UPGRADE to 3.9.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade +-message
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade +-message
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
kddi \+ message UPGRADE
Affected: < 3.9.4
Fixed in: 3.9.4
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy +-message || rpm -q +-message || +-message --version
2. UPGRADE to 3.9.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade +-message
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade +-message
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
softbank \+ message UPGRADE
Affected: < 3.9.4
Fixed in: 3.9.4
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy +-message || rpm -q +-message || +-message --version
2. UPGRADE to 3.9.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade +-message
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade +-message
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
softbank \+ message UPGRADE
Affected: < 12.9.5
Fixed in: 12.9.5
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy +-message || rpm -q +-message || +-message --version
2. UPGRADE to 12.9.5 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade +-message
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade +-message
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-43543?

\+ message: upgrade to 3.9.4; \+ message: upgrade to 54.49.0500; \+ message: upgrade to 3.9.2. Exact commands for each OS are on this page.

Is CVE-2022-43543 being exploited?

CVE-2022-43543 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-43543 affect?

CVE-2022-43543 affects \+ message, \+ message, \+ message. Severity is medium (CVSS 5.4). 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

How urgent is CVE-2022-43543?

Priority 30/100. No elevated risk signals yet.

References

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