CVE-2014-5821: The Guitar Tuner Free - GuitarTuna (aka com.ovelin.guitartuna) application 2.4.5 for Android does not verify X

Routine

MEDIUM 5.4DOWNGRADE

CVE-2014-5821 is a medium-severity flaw (CVSS 5.4) affecting guitar tuner free - guitartuna. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Guitar Tuner Free - GuitarTuna (aka com.ovelin.guitartuna) application 2.4.5 for Android does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.4 (Medium)
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-310
Published	2014-09-09
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: guitartuna

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

Am I affected?

Timeline

2014-09-09 10:55 UTCPublished CVE record published
2026-06-17 00:12 UTCUpdated Record last modified

guitartuna guitar tuner free - guitartuna DOWNGRADE

Affected: 2.4.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.5

1. Check installed version

apt-cache policy guitar-tuner-free---guitartuna || rpm -q guitar-tuner-free---guitartuna || guitar-tuner-free---guitartuna --version

2. No fixed release: DOWNGRADE to a release before 2.4.5 (Debian / Ubuntu)

apt-cache madison guitar-tuner-free---guitartuna sudo apt install guitar-tuner-free---guitartuna=<VERSION_BEFORE_2.4.5> sudo apt-mark hold guitar-tuner-free---guitartuna

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list guitar-tuner-free---guitartuna sudo dnf downgrade guitar-tuner-free---guitartuna-<VERSION_BEFORE_2.4.5> sudo dnf versionlock add guitar-tuner-free---guitartuna

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2014-5821?

guitar tuner free - guitartuna: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2014-5821 being exploited?

CVE-2014-5821 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-2014-5821 affect?

CVE-2014-5821 affects guitar tuner free - guitartuna. Severity is medium (CVSS 5.4). The Guitar Tuner Free - GuitarTuna (aka com.ovelin.guitartuna) application 2.4.5 for Android does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via

How urgent is CVE-2014-5821?

Priority 24/100. No elevated risk signals yet.

Software pages

Android vulnerabilities

References

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