CVE-2014-3426: NCSA Mosaic 2.1 through 2.7b5 allows local users to cause a denial of service ("remote control" outage) by cre

Routine

LOW 2.1DOWNGRADE

CVE-2014-3426 is a low-severity flaw (CVSS 2.1) affecting ncsa mosaic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NCSA Mosaic 2.1 through 2.7b5 allows local users to cause a denial of service ("remote control" outage) by creating a /tmp/Mosaic.pid file for every possible PID.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Published	2014-05-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: illinois

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

Am I affected?

Timeline

2014-05-08 10:55 UTCPublished CVE record published
2026-06-17 00:08 UTCUpdated Record last modified

illinois ncsa mosaic DOWNGRADE

Affected: 2.1 · 2.7 · 2.7 b5

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1

1. Check installed version

apt-cache policy ncsa-mosaic || rpm -q ncsa-mosaic || ncsa-mosaic --version

2. No fixed release: DOWNGRADE to a release before 2.1 (Debian / Ubuntu)

apt-cache madison ncsa-mosaic sudo apt install ncsa-mosaic=<VERSION_BEFORE_2.1> sudo apt-mark hold ncsa-mosaic

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

dnf --showduplicates list ncsa-mosaic sudo dnf downgrade ncsa-mosaic-<VERSION_BEFORE_2.1> sudo dnf versionlock add ncsa-mosaic

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-2014-3426?

ncsa mosaic: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2014-3426 being exploited?

CVE-2014-3426 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-2014-3426 affect?

CVE-2014-3426 affects ncsa mosaic. Severity is low (CVSS 2.1). NCSA Mosaic 2.1 through 2.7b5 allows local users to cause a denial of service ("remote control" outage) by creating a /tmp/Mosaic.pid file for every possible PID.

How urgent is CVE-2014-3426?

Priority 13/100. No elevated risk signals yet.

Related CVEs

CVE-2014-3425 LOW 2.1 UPGRADE NCSA Mosaic 2.0 and earlier allows local users to cause a denial of service ("remote control" outage) by creat

References

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