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CVE-2020-1646

19
FAUCET Score

CVE-2020-1646 is a denial-of-service vulnerability affecting Juniper Networks Junos OS and Junos OS Evolved. Specifically, processing a crafted BGP UPDATE for an EBGP peer can cause the routing process daemon (RPD) to crash and restart, leading to an extended DoS condition if repeated. This vulnerability is rated High severity (CVSS 7.5) due to its network-based attack vector, low attack complexity, and high impact on availability. There is currently no public exploit code available, no evidence of active exploitation, and minimal community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
17.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.3:r3-s6:*:*:*:*:*:*
17.4CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.4:r2-s7:*:*:*:*:*:*
18.1CPE matchmatch criteria
cpe:2.3:o:juniper:junos:18.1:r3-s7:*:*:*:*:*:*
19.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos_os_evolved:19.2:r2:*:*:*:*:*:*

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
1.01%
Probability of exploitation in next 30 days
EPSS Percentile
59.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0101 is in the 36th 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 / JSA11033
Vendor Advisory