Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-0284

25
FAUCET Score

CVE-2021-0284 is a buffer overflow vulnerability in the TCP/IP stack of Juniper Networks Junos OS, affecting numerous versions across multiple releases. An unauthenticated attacker can trigger a Denial of Service (DoS) by sending specially crafted packet sequences directly to the device, leading to an abnormal shutdown. This vulnerability has a CVSSv3.1 score of 7.5 (High), indicating a network-based attack with low complexity and high impact on availability. There is 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
>= 12.3, < 12.3R12-S19CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
>= 15.1, < 15.1R7-S10CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
>= 17.3, < 17.3R3-S12CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
>= 19.1, < 19.1R3-S7CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
>= 19.4, < 19.4R3-S5CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*

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
0.99%
Probability of exploitation in next 30 days
EPSS Percentile
59.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0099 is in the 35th 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 / JSA11200
Vendor Advisory