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CVE-2016-1280

19
FAUCET Score

CVE-2016-1280 describes a vulnerability in Juniper Junos OS versions prior to specific updates across multiple release trains. This flaw allows remote attackers to bypass certificate validation by presenting a self-signed certificate whose Issuer name matches a valid Certificate Authority (CA) certificate already enrolled in Junos. The vulnerability has a CVSS v3 score of 6.5 (Medium), indicating it can be exploited over the network with low attack complexity and no user interaction, potentially leading to limited confidentiality and integrity impacts. There is no evidence of active exploitation, no public exploit code available in common frameworks like Metasploit or Nuclei, and it is not listed in the KEV catalog. Despite limited community discussion and media coverage, it was noted by SecurityWeek.

Impacted Technologies

VendorProductVersion(s)CPE
<= 12.1x44CPE matchmatch criteria
cpe:2.3:o:juniper:junos:*:d50:*:*:*:*:*:*
12.1x46CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.1x46:*:*:*:*:*:*:*
12.1x46CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.1x46:d10:*:*:*:*:*:*
12.1x46CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.1x46:d15:*:*:*:*:*:*
12.1x46CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.1x46:d20:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.67%
Probability of exploitation in next 30 days
EPSS Percentile
48.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0067 is in the 30th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 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/91761
securitytracker.com / id/1036303