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CVE-2015-7754

21
FAUCET Score

CVE-2015-7754 is a critical vulnerability affecting Juniper ScreenOS versions prior to 6.3.0r21 when ssh-pka is configured and enabled. This flaw allows remote attackers to cause a denial of service or execute arbitrary code through crafted SSH negotiation. With a CVSS score of 8.1 (HIGH), it presents a significant risk due to its network-based attack vector, high impact on confidentiality, integrity, and availability, and low attack complexity. While there is no evidence of active exploitation, nor publicly available exploit code, the vulnerability has garnered some community discussion, including a Reddit post highlighting its severity.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.3.0CPE matchmatch criteria
cpe:2.3:o:juniper:screenos:*:r20:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.85%
Probability of exploitation in next 30 days
EPSS Percentile
89.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0386 is in the 51st percentile among its peer group of 8,914 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

junipervendor investigatingvia nvd_reference
View patch

References

kb.juniper.net / InfoCenter/index
Vendor Advisory
securityfocus.com / bid/79627
securitytracker.com / id/1034490