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CVE-2021-0231

22
FAUCET Score

CVE-2021-0231 describes a path traversal vulnerability in Juniper Networks Junos OS affecting SRX and vSRX Series devices running specific versions prior to their respective patches. An authenticated J-web user can exploit this weakness to read sensitive system files. Rated Medium (CVSS 6.5), the vulnerability requires low privileges and network access, leading to high confidentiality impact without affecting integrity or availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
19.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:*
19.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:*
19.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*
19.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:*
19.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.23%
Probability of exploitation in next 30 days
EPSS Percentile
65.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0123 is in the 80th percentile among its peer group of 21,977 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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 / JSA11126
Vendor Advisory