CVE-2021-0281

mediumpriority · track · 30EPSS 0.008 · 57 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.82% (57th) EPSS

CVSS 4.3 · medium

Is it mine?

47 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · fstec_bdu

EPSS · scored 2026-10-27

On Juniper Networks Junos OS devices configured with BGP origin validation using Resource Public Key Infrastructure (RPKI) receipt of a specific packet from the RPKI cache server may cause routing process daemon (RPD) to crash and restart, creating a Denial of Service (DoS) condition. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R2-S4, 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R2-S2-EVO.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.3–7.5

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.15.9mediumAV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · sirt@juniper.net USexploitability 2.2 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754USprimaryCWE-754US

affected products (47)

Products and version ranges known to be affected.

Juniper Networks Junos OS17.3 → 17.3R3-S12enisa_euvdEU
Juniper Networks Junos OS17.4 → 17.4R3-S5enisa_euvdEU
Juniper Networks Junos OS18.1 → 18.1R3-S13enisa_euvdEU
Juniper Networks Junos OS18.2 → 18.2R3-S8enisa_euvdEU
Juniper Networks Junos OS18.3 → 18.3R3-S5enisa_euvdEU
Juniper Networks Junos OS18.4 → 18.4R2-S8, 18.4R3-S8enisa_euvdEU
Juniper Networks Junos OS19.1 → 19.1R3-S5enisa_euvdEU
Juniper Networks Junos OS19.2 → 19.2R3-S2enisa_euvdEU
Juniper Networks Junos OS19.3 → 19.3R2-S6, 19.3R3-S2enisa_euvdEU
Juniper Networks Junos OS19.4 → 19.4R2-S4, 19.4R3-S3enisa_euvdEU
Juniper Networks Junos OS20.1 → 20.1R3enisa_euvdEU
Juniper Networks Junos OS20.2 → 20.2R3enisa_euvdEU
Juniper Networks Junos OS20.3 → 20.3R2enisa_euvdEU
Juniper Networks Junos OS20.4 → 20.4R2enisa_euvdEU
Juniper Networks Junos OS EvolvedAll → 20.4R2-S2-EVOenisa_euvdEU
Juniper Networks Inc. JunOS17.3 → 17.3R3-S12fstec_bduRU
Juniper Networks Inc. JunOS17.4 → 17.4R3-S5fstec_bduRU
Juniper Networks Inc. JunOS18.1 → 18.1R3-S13fstec_bduRU
Juniper Networks Inc. JunOS18.2 → 18.2R3-S8fstec_bduRU
Juniper Networks Inc. JunOS18.3 → 18.3R3-S5fstec_bduRU

showing 20 of 47

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu NVD CVE.org MITRE

published 2021-07-15modified 2026-06-17

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references (8)

External citations — patches, advisories, analysis.

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