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CVE-2016-1278

20
FAUCET Score

CVE-2016-1278 describes a critical vulnerability in Juniper Junos OS versions prior to 12.1X46-D50 on SRX Series devices. This flaw allows local users to gain root CLI access without a password if a system upgrade to 12.1X46 fails, causing the device to revert to "safe mode" authentication. With a CVSS score of 7.8 (High), this vulnerability presents a significant risk, as it enables privilege escalation through a low-complexity local attack, leading to high impacts on confidentiality, integrity, and availability. While the vulnerability has garnered some community discussion and media coverage, there is no evidence of active exploitation, nor are public exploit codes available in Metasploit, Nuclei, or ExploitDB.

Impacted Technologies

VendorProductVersion(s)CPE
<= 12.1x46CPE matchmatch criteria
cpe:2.3:o:juniper:junos:*:d45:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
36.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 37th percentile among its peer group of 11,621 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

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

juniperworkaround availablevia nvd_reference
View patch

References

kb.juniper.net / InfoCenter/index
MitigationVendor Advisory
securityfocus.com / bid/91757
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036307
Third Party AdvisoryVDB Entry