CVE-2018-0691: Multiple +Message Apps (Softbank +Message App for Android prior to version 10.1.7, Softbank +Message App for i

Q: How do I fix CVE-2018-0691?

\+ message: upgrade to 1.0.6, 1.1.23; \+ message: upgrade to 42.40.2800; \+ message: upgrade to 1.1.23, 10.1.7. Exact commands for each OS are on this page.

Q: Is CVE-2018-0691 being exploited?

CVE-2018-0691 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-0691 affect?

CVE-2018-0691 affects \+ message, \+ message, \+ message. Severity is medium (CVSS 5.9). Multiple +Message Apps (Softbank +Message App for Android prior to version 10.1.7, Softbank +Message App for iOS prior to version 1.1.23, NTT DOCOMO +Message App for Android prior to version 42.40.2800, NTT DOCOMO +Message App for iOS prior

Q: How urgent is CVE-2018-0691?

Priority 39/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.9REMOTEUPGRADEUPGRADEUPGRADE

CVE-2018-0691 is a medium-severity flaw (CVSS 5.9) affecting \+ message, \+ message, \+ message. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple +Message Apps (Softbank +Message App for Android prior to version 10.1.7, Softbank +Message App for iOS prior to version 1.1.23, NTT DOCOMO +Message App for Android prior to version 42.40.2800, NTT DOCOMO +Message App for iOS prior to version 1.1.23, KDDI +Message App for Android prior to version 1.0.6, and KDDI +Message App for iOS prior to version 1.1.23) do not verify X.509 certificates from SSL servers, which allows man-in-the-middle

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-295
Published	2018-11-15
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: kddi · ntt tocomo · ntttocomo · softbank

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

Am I affected?

Timeline

2018-11-15 15:29 UTCPublished CVE record published
2026-06-17 01:31 UTCUpdated Record last modified

kddi \+ message UPGRADE

Affected: < 1.0.6 · < 1.1.23

Fixed in: 1.0.6, 1.1.23

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy +-message || rpm -q +-message || +-message --version

2. UPGRADE to 1.0.6 (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.

ntttocomo \+ message UPGRADE

Affected: < 42.40.2800

Fixed in: 42.40.2800

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy +-message || rpm -q +-message || +-message --version

2. UPGRADE to 42.40.2800 (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: < 10.1.7 · < 1.1.23

Fixed in: 1.1.23, 10.1.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy +-message || rpm -q +-message || +-message --version

2. UPGRADE to 1.1.23 (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.

ntt tocomo \+ message UPGRADE

Affected: < 1.1.23

Fixed in: 1.1.23

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy +-message || rpm -q +-message || +-message --version

2. UPGRADE to 1.1.23 (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-2018-0691?

\+ message: upgrade to 1.0.6, 1.1.23; \+ message: upgrade to 42.40.2800; \+ message: upgrade to 1.1.23, 10.1.7. Exact commands for each OS are on this page.

Is CVE-2018-0691 being exploited?

CVE-2018-0691 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-2018-0691 affect?

CVE-2018-0691 affects \+ message, \+ message, \+ message. Severity is medium (CVSS 5.9). Multiple +Message Apps (Softbank +Message App for Android prior to version 10.1.7, Softbank +Message App for iOS prior to version 1.1.23, NTT DOCOMO +Message App for Android prior to version 42.40.2800, NTT DOCOMO +Message App for iOS prior

How urgent is CVE-2018-0691?

Priority 39/100. Remotely exploitable, no login, no user action

Software pages

Android vulnerabilities · iOS vulnerabilities

Related CVEs

CVE-2022-43543 MEDIUM 5.4 UPGRADE UPGRADE KDDI +Message App, NTT DOCOMO +Message App, and SoftBank +Message App contain a vulnerability caused by improp

References

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