CVE-2014-2842: Juniper ScreenOS 6.3 and earlier allows remote attackers to cause a denial of service (crash and restart or fa

Q: How do I fix CVE-2014-2842?

screenos: upgrade to newer than 6.3.0. Exact commands for each OS are on this page.

Q: Is CVE-2014-2842 being exploited?

CVE-2014-2842 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-2014-2842 affect?

CVE-2014-2842 affects screenos. Severity is high (CVSS 7.8). Juniper ScreenOS 6.3 and earlier allows remote attackers to cause a denial of service (crash and restart or failover) via a malformed SSL/TLS packet.

This month

HIGH 7.8UPGRADE

CVE-2014-2842 is a high-severity flaw (CVSS 7.8) affecting screenos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Juniper ScreenOS 6.3 and earlier allows remote attackers to cause a denial of service (crash and restart or failover) via a malformed SSL/TLS packet.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	3.6% (top 11%)
CISA exploited list	No
Weakness	CWE-399
Published	2014-04-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: juniper

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

Am I affected?

Timeline

2014-04-15 14:55 UTCPublished CVE record published
2026-06-17 00:07 UTCUpdated Record last modified

juniper screenos UPGRADE

Affected: <= 6.3.0 · 5.4.0 · 6.0.0 · 6.1.0 · 6.2.0

Fixed in: newer than 6.3.0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2014-2842?

screenos: upgrade to newer than 6.3.0. Exact commands for each OS are on this page.

Is CVE-2014-2842 being exploited?

CVE-2014-2842 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-2014-2842 affect?

CVE-2014-2842 affects screenos. Severity is high (CVSS 7.8). Juniper ScreenOS 6.3 and earlier allows remote attackers to cause a denial of service (crash and restart or failover) via a malformed SSL/TLS packet.

How urgent is CVE-2014-2842?

Priority 50/100. High severity

Software pages

Juniper Junos vulnerabilities

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References

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