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CVE-2020-1670

17
FAUCET Score

CVE-2020-1670 describes a vulnerability in Juniper Networks EX4300 Series switches where a stream of specific IPv4 packets on an IRB interface can cause a high CPU load on the Routing Engine, leading to network disruption. This issue is limited to the broadcast domain and only affects IPv4 traffic. The vulnerability has a CVSS score of 6.5 (Medium), indicating an attack vector that is adjacent, low complexity, and can result in high availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
17.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.3:-:*:*:*:*:*:*
17.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.3:r1-s1:*:*:*:*:*:*
17.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.3:r2:*:*:*:*:*:*
17.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.3:r2-s1:*:*:*:*:*:*
17.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.3:r2-s2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

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

Exploit Intelligence

EPSS Score
0.53%
Probability of exploitation in next 30 days
EPSS Percentile
41.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0053 is in the 64th percentile among its peer group of 1,802 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, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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 / InfoCenter/index
Vendor Advisory
kb.juniper.net
Vendor Advisory