CVE-2015-4640: The SwiftKey language-pack update implementation on Samsung Galaxy S4, S4 Mini, S5, and S6 devices relies on a

Routine

LOW 2.9MITIGATE

CVE-2015-4640 is a low-severity flaw (CVSS 2.9) affecting swiftkey sdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The SwiftKey language-pack update implementation on Samsung Galaxy S4, S4 Mini, S5, and S6 devices relies on an HTTP connection to the skslm.swiftkey.net server, which allows man-in-the-middle attackers to write to language-pack files by modifying an HTTP response. NOTE: CVE-2015-4640 exploitation can be combined with CVE-2015-4641 exploitation for man-in-the-middle code execution.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	2.9 (Low)
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-254
Published	2015-06-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: swiftkey

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

Am I affected?

Timeline

2015-06-19 14:59 UTCPublished CVE record published
2026-06-17 00:27 UTCUpdated Record last modified

swiftkey swiftkey sdk MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy swiftkey-sdk || rpm -q swiftkey-sdk || swiftkey-sdk --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2015-4640?

swiftkey sdk: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-4640 being exploited?

CVE-2015-4640 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-2015-4640 affect?

CVE-2015-4640 affects swiftkey sdk. Severity is low (CVSS 2.9). The SwiftKey language-pack update implementation on Samsung Galaxy S4, S4 Mini, S5, and S6 devices relies on an HTTP connection to the skslm.swiftkey.net server, which allows man-in-the-middle attackers to write to language-pack files by mo

How urgent is CVE-2015-4640?

Priority 30/100. Public exploit reference

Software pages

Samsung vulnerabilities

Related CVEs

CVE-2015-4641 MEDIUM 6.4 MITIGATE Directory traversal vulnerability in the SwiftKey language-pack update implementation on Samsung Galaxy S4, S4

References

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