How severe is CVE-2020-1629?

CVE-2020-1629 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-1629 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-1629?

CVE-2020-1629 primarily affects Juniper Junos. In total, 147 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-1629?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-1629 published?

CVE-2020-1629 was published on 2020-04-08 and last updated on 2026-06-17.

CVE-2020-1629

CVE-2020-1629 is a medium-severity vulnerability in Juniper Junos with a CVSS 3.x base score of 5.9. 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-362.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Juniper Junos
Published: 2020-04-08
Last modified: 2026-06-17

Description

A race condition vulnerability on Juniper Network Junos OS devices may cause the routing protocol daemon (RPD) process to crash and restart while processing a BGP NOTIFICATION message. This issue affects Juniper Networks Junos OS: 16.1 versions prior to 16.1R7-S6; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R3-S3; 17.2 version 17.2R2 and later versions; 17.2X75 versions prior to 17.2X75-D105, 17.2X75-D110; 17.3 versions prior to 17.3R2-S5, 17.3R3-S6; 17.4 versions prior to 17.4R2-S7, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R3-S3; 18.2X75 versions prior to 18.2X75-D410, 18.2X75-D420, 18.2X75-D50, 18.2X75-D60; 18.3 versions prior to 18.3R1-S5, 18.3R2-S2, 18.3R3; 18.4 versions prior to 18.4R2-S2, 18.4R3; 19.1 versions prior to 19.1R1-S2, 19.1R2; 19.2 versions prior to 19.2R1-S4, 19.2R2. This issue does not affect Juniper Networks Junos OS prior to version 16.1R1.

Frequently asked questions

What is CVE-2020-1629?: A race condition vulnerability on Juniper Network Junos OS devices may cause the routing protocol daemon (RPD) process to crash and restart while processing a BGP NOTIFICATION message. This issue affects Juniper Networks Junos OS: 16.1 versions prior to 16.1R7-S6; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R3-S3; 17.2 version 17.2R2 and later versions; 17.2X75 versions prior to 17.2X75-D105, 17.2X75-D110; 17.3 versions prior to 17.3R2-S5, 17.3R3-S6; 17.4 versions prior to 17.4R2-S7, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R3-S3; 18.2X75 versions prior to 18.2X75-D410, 18.2X75-D420, 18.2X75-D50, 18.2X75-D60; 18.3 versions prior to 18.3R1-S5, 18.3R2-S2, 18.3R3; 18.4 versions prior to 18.4R2-S2, 18.4R3; 19.1 versions prior to 19.1R1-S2, 19.1R2; 19.2 versions prior to 19.2R1-S4, 19.2R2. This issue does not affect Juniper Networks Junos OS prior to version 16.1R1.
How severe is CVE-2020-1629?: CVE-2020-1629 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-1629 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-1629?: CVE-2020-1629 primarily affects Juniper Junos. In total, 147 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-1629?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-1629 published?: CVE-2020-1629 was published on 2020-04-08 and last updated on 2026-06-17.

References

https://kb.juniper.net/JSA11009

Affected products (147)

cpe:2.3:o:juniper:junos:16.1:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r3-s10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r3-s11:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r4-s12:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r4-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r4-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r4-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r4-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r5-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r6-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r6-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r7-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r7-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r7-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.1:r7-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r2-s10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r2-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r2-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r2-s7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r2-s8:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:16.2:r2-s9:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.1:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.1:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.1:r2-s10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.1:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.1:r2-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:17.1:r2-s4:*:*:*:*:*:*

More vulnerabilities in Juniper Junos

CVE-2021-0248 — Critical (CVSS 10.0): This issue is not applicable to NFX NextGen Software. On NFX Series devices the use of Hard-coded Credentials in…
CVE-2021-0211 — Critical (CVSS 10.0): An improper check for unusual or exceptional conditions in Juniper Networks Junos OS and Junos OS Evolved Routing…
CVE-2020-1614 — Critical (CVSS 10.0): A Use of Hard-coded Credentials vulnerability exists in the NFX250 Series for the vSRX Virtual Network Function (VNF)…
CVE-2017-2343 — Critical (CVSS 10.0): The Integrated User Firewall (UserFW) feature was introduced in Junos OS version 12.1X47-D10 on the Juniper SRX Series…
CVE-2013-4685 — Critical (CVSS 10.0): Buffer overflow in flowd in Juniper Junos 10.4 before 10.4S14, 11.4 before 11.4R7, 12.1 before 12.1R6, and 12.1X44…
CVE-2017-2349 — Critical (CVSS 9.9): A command injection vulnerability in the IDP feature of Juniper Networks Junos OS on SRX series devices potentially…

All CVEs affecting Juniper Junos →

Other CWE-362 (Race Condition) vulnerabilities

CVE-2022-27626 — Critical (CVSS 10.0): A vulnerability regarding concurrent execution using shared resource with improper synchronization ('Race Condition')…
CVE-2015-8556 — Critical (CVSS 10.0): Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.
CVE-2014-0703 — Critical (CVSS 10.0): Cisco Wireless LAN Controller (WLC) devices 7.4 before 7.4.110.0 distribute Aironet IOS software with a race condition…
CVE-2010-1228 — Critical (CVSS 10.0): Multiple race conditions in the sandbox infrastructure in Google Chrome before 4.1.249.1036 have unspecified impact and…
CVE-2008-6598 — Critical (CVSS 10.0): Multiple race conditions in WANPIPE before 3.3.6 have unknown impact and attack vectors related to "bri restart logic."
CVE-2026-46137 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: fix potential…

Browse all CWE-362 (Race Condition) vulnerabilities →