How severe is CVE-2020-1613?

CVE-2020-1613 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-1613 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-1613?

CVE-2020-1613 primarily affects Juniper Junos. In total, 202 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-1613?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-1613 published?

CVE-2020-1613 was published on 2020-04-08 and last updated on 2026-06-17.

CVE-2020-1613

CVE-2020-1613 is a high-severity vulnerability in Juniper Junos with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-710.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-710
Affected product: Juniper Junos
Published: 2020-04-08
Last modified: 2026-06-17

Description

A vulnerability in the BGP FlowSpec implementation may cause a Juniper Networks Junos OS device to terminate an established BGP session upon receiving a specific BGP FlowSpec advertisement. The BGP NOTIFICATION message that terminates an established BGP session is sent toward the peer device that originally sent the specific BGP FlowSpec advertisement. This specific BGP FlowSpec advertisement received from a BGP peer might get propagated from a Junos OS device running the fixed release to another device that is vulnerable causing BGP session termination downstream. This issue affects IPv4 and IPv6 BGP FlowSpec deployment. This issue affects Juniper Networks Junos OS: 12.3; 12.3X48 on SRX Series; 14.1X53 on EX and QFX Series; 15.1 versions prior to 15.1R7-S5; 15.1F versions prior to 15.1F6-S13; 15.1X49 versions prior to 15.1X49-D180 on SRX Series; 15.1X53 versions prior to 15.1X53-D238 on QFX5200/QFX5110; 15.1X53 versions prior to 15.1X53-D497 on NFX Series; 15.1X53 versions prior to 15.1X53-D592 on EX2300/EX3400; 16.1 versions prior to 16.1R7-S7; 17.1 versions prior to 17.1R2-S12, 17.1R3; 17.2 versions prior to 17.2R2-S7, 17.2R3; 17.2X75 versions prior to 17.2X75-D102, 17.2X75-D110, 17.2X75-D44; 17.3 versions prior to 17.3R2-S5, 17.3R3-S5; 17.4 versions prior to 17.4R1-S8, 17.4R2; 18.1 versions prior to 18.1R2-S4, 18.1R3; 18.2X75 versions prior to 18.2X75-D20.

Frequently asked questions

What is CVE-2020-1613?: A vulnerability in the BGP FlowSpec implementation may cause a Juniper Networks Junos OS device to terminate an established BGP session upon receiving a specific BGP FlowSpec advertisement. The BGP NOTIFICATION message that terminates an established BGP session is sent toward the peer device that originally sent the specific BGP FlowSpec advertisement. This specific BGP FlowSpec advertisement received from a BGP peer might get propagated from a Junos OS device running the fixed release to another device that is vulnerable causing BGP session termination downstream. This issue affects IPv4 and IPv6 BGP FlowSpec deployment. This issue affects Juniper Networks Junos OS: 12.3; 12.3X48 on SRX Series; 14.1X53 on EX and QFX Series; 15.1 versions prior to 15.1R7-S5; 15.1F versions prior to 15.1F6-S13; 15.1X49 versions prior to 15.1X49-D180 on SRX Series; 15.1X53 versions prior to 15.1X53-D238 on QFX5200/QFX5110; 15.1X53 versions prior to 15.1X53-D497 on NFX Series; 15.1X53 versions prior to 15.1X53-D592 on EX2300/EX3400; 16.1 versions prior to 16.1R7-S7; 17.1 versions prior to 17.1R2-S12, 17.1R3; 17.2 versions prior to 17.2R2-S7, 17.2R3; 17.2X75 versions prior to 17.2X75-D102, 17.2X75-D110, 17.2X75-D44; 17.3 versions prior to 17.3R2-S5, 17.3R3-S5; 17.4 versions prior to 17.4R1-S8, 17.4R2; 18.1 versions prior to 18.1R2-S4, 18.1R3; 18.2X75 versions prior to 18.2X75-D20.
How severe is CVE-2020-1613?: CVE-2020-1613 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-1613 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-1613?: CVE-2020-1613 primarily affects Juniper Junos. In total, 202 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-1613?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-1613 published?: CVE-2020-1613 was published on 2020-04-08 and last updated on 2026-06-17.

References

https://kb.juniper.net/JSA10996

Affected products (202)

cpe:2.3:o:juniper:junos:12.3:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f2-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f2-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f5-s7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f6-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f6-s12:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f6-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f6-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f6-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f6-s7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:f7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r4-s7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r4-s8:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r4-s9:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r5-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r5-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r5-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r6-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r6-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r6-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r7-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r7-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r7-s3:*:*:*:*:*:*

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