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CVE-2020-1679

19
FAUCET Score

CVE-2020-1679 affects Juniper Networks PTX and QFX Series devices running specific Junos OS versions, where a malformed packet sampled via tunnel-observation mpls-over-udp can cause the Kernel Routing Table (KRT) queue to become stuck, leading to unexpected packet forwarding issues. This vulnerability has a CVSS score of 7.5 (HIGH), indicating a network-based attack with low complexity and no user interaction required, resulting in high availability impact. There is no known active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage regarding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
17.2x75CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2x75:*:*:*:*:*:*:*
17.2x75CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2x75:-:*:*:*:*:*:*
17.2x75CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2x75:d102:*:*:*:*:*:*
17.2x75CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2x75:d50:*:*:*:*:*:*
17.2x75CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2x75:d70:*:*:*:*:*:*

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
1.24%
Probability of exploitation in next 30 days
EPSS Percentile
66.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0124 is in the 45th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

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 / JSA11076
Vendor Advisory