Screenos vulnerabilitiesAnd the versions its exploited flaws hit.
Screenos is made by Juniper. We track 16 published vulnerabilities in it, across 38 versions. 1 of them is on the list of flaws known to be exploited, the newest added on 2 October 2025. If you run Screenos, check your version against the exploited flaws below and patch those first.
The most recent Screenos flaw added to the known-exploited list is CVE-2015-7755, on 2 October 2025. We keep watching the known-exploited list.
Which versions of Screenos do the exploited flaws hit?
Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.
- CVE-2015-7755Exploited list, 2 Oct 2025
Juniper ScreenOS Improper Authentication Vulnerability
6.3.0-r176.3.0-r186.3.0-r196.3.0-r20
Which Screenos vulnerabilities are being exploited?
1 flaw is on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 9.8Juniper ScreenOS Improper Authentication Vulnerability
Juniper ScreenOS contains an improper authentication vulnerability that could allow unauthorized remote administrative access to the device.
Which Screenos flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 61%
Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18...
- 3.9%CVE-2015-7754High
Juniper ScreenOS before 6.3.0r21, when ssh-pka is configured and enabled, allows remote attackers to cause a denial of service (system crash) or execute arbitrary code via crafted SSH negotiation.
- 3.6%CVE-2014-2842High
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.
- 2.5%CVE-2015-7756Medium
The encryption implementation in Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b,...
- 2.0%CVE-2015-7750Medium
The L2TP packet processing functionality in Juniper Netscreen and ScreenOS Firewall products with ScreenOS before 6.3.0r13-dnd1, 6.3.0r14 through 6.3.0r18 before 6.3.0r18-dnc1, and 6.3.0r19 allows remote attackers to...
- 1.9%CVE-2016-1268High
The administrative web services interface in Juniper ScreenOS before 6.3.0r21 allows remote attackers to cause a denial of service (reboot) via a crafted SSL packet.
- 1.9%CVE-2013-6958High
Juniper NetScreen Firewall running ScreenOS 5.4, 6.2, or 6.3, when the Ping of Death screen is disabled, allows remote attackers to cause a denial of service via a crafted packet.
- 1.3%CVE-2014-3814High
The Juniper Networks NetScreen Firewall devices with ScreenOS before 6.3r17, when configured to use the internal DNS lookup client, allows remote attackers to cause a denial of service (crash and reboot) via a...
- 1.3%CVE-2014-3813High
Unspecified vulnerability in the Juniper Networks NetScreen Firewall products with ScreenOS before 6.3r17, when configured to use the internal DNS lookup client, allows remote attackers to cause a denial of service...
- 1.2%CVE-2017-2336Critical
A reflected cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firewall+VPN running ScreenOS allows a network based attacker to inject HTML/JavaScript content into the...
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1 flaw being exploited affects software Acme tracks
Juniper ScreenOS contains an improper authentication vulnerability that could allow unauthorized remote administrative access to the device.
- Matched to
- Screenos on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 16 published vulnerabilities listed under the name Screenos, across 38 versions. The most recent Screenos flaw added to the known-exploited list is CVE-2015-7755, on 2 October 2025.
1 is on the list of flaws known to be exploited. The most recently added is CVE-2015-7755.
Each flaw names its own versions, usually as ranges. The newest, CVE-2015-7755, affects 6.3.0-r17, 6.3.0-r18, 6.3.0-r19, 6.3.0-r20. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Screenos. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.