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CVE-2021-0252

25
FAUCET Score

CVE-2021-0252 is a local code execution vulnerability in Juniper Networks Junos OS on NFX Series devices, allowing an authenticated attacker to elevate privileges through the Junos Device Management Daemon (JDMD) process. This vulnerability affects various versions of Junos OS 18.1 through 19.2 on NFX Series devices. With a CVSS score of 7.8 (HIGH), it has a low attack complexity and requires local user privileges, potentially leading to high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 18.2, < 18.2R3-S5CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
18.1CPE matchmatch criteria
cpe:2.3:o:juniper:junos:18.1:r1:*:*:*:*:*:*
18.1CPE matchmatch criteria
cpe:2.3:o:juniper:junos:18.1:r2:*:*:*:*:*:*
18.1CPE matchmatch criteria
cpe:2.3:o:juniper:junos:18.1:r2-s1:*:*:*:*:*:*
18.1CPE matchmatch criteria
cpe:2.3:o:juniper:junos:18.1:r2-s2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.53%
Probability of exploitation in next 30 days
EPSS Percentile
41.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0053 is in the 81st percentile among its peer group of 17,070 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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)

junipervendor investigatingvia nvd_reference
View patch

References

github.com / orangecertcc/security-research/security/advisories/GHSA-gr7j-26pv-5v57
ExploitThird Party Advisory
kb.juniper.net / JSA11145
Vendor Advisory