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CVE-2021-0286

25
FAUCET Score

CVE-2021-0286 describes a Denial of Service (DoS) vulnerability in Juniper Networks Junos OS Evolved (EVO) versions prior to 20.4R2-EVO and 21.1R2-EVO. An unauthenticated attacker can send specially crafted packets to the device, causing the Advanced Forwarding Toolkit manager process to crash and restart, disrupting all traffic through the FPC. This vulnerability has a CVSS v3.1 score of 7.5 (High), indicating a network-based attack with low complexity, requiring no user interaction or privileges, and resulting in high availability impact. The EPSS score is low at 0.00153, suggesting a low probability of exploitation in the wild. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are also minimal, suggesting it has not garnered significant attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 20.4R2-EVOCPE match
cpe:2.3:o:juniper:junos_os_evolved:*:r1:*:*:*:*:*:*
>= 21.1, < 21.1R2-EVOCPE match
cpe:2.3:o:juniper:junos_os_evolved:*:r1:*:*:*:*:*:*
19.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:*
19.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:*
19.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos_os_evolved:19.3:r1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.06%
Probability of exploitation in next 30 days
EPSS Percentile
60.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0106 is in the 38th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 / JSA11188
Vendor Advisory