CVE-2021-31384

highpriority · track · 40OT risk · elevatedEPSS 0.012 · 67 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.16% (67th) EPSS

CVSS 7.5 · high

Is it mine?

8 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

Due to a Missing Authorization weakness and Insufficient Granularity of Access Control in a specific device configuration, a vulnerability exists in Juniper Networks Junos OS on SRX Series whereby an attacker who attempts to access J-Web administrative interfaces can successfully do so from any device interface regardless of the web-management configuration and filter rules which may otherwise protect access to J-Web. This issue affects: Juniper Networks Junos OS SRX Series 20.4 version 20.4R1 and later versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.4R1.

cvss

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

10.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.2–10

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 6

v3.18.3highAV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:Nsecondary · ENISA EU

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:Nsecondary · sirt@juniper.net USexploitability 3.9 · impact 2.7

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-862USprimaryCWE-1220USCWE-285USCWE-285USCWE-531USCWE-551USCWE-862USCWE-939USCWE-939US

affected products (8)

Products and version ranges known to be affected.

Juniper Networks Junos OS20.4R1 → 20.4*enisa_euvdEU
Juniper Networks Junos OS21.1 → 21.1R1-S1, 21.1R2enisa_euvdEU
Juniper Networks Inc. JunOS20.4 → 20.4R3fstec_bduRU
Juniper Networks Inc. JunOS20.4R1 → 20.4R2-S1fstec_bduRU
Juniper Networks Inc. JunOS21.1 → 21.1R2fstec_bduRU
Juniper Networks Inc. JunOS21.1 → 21.1R1-S1fstec_bduRU
juniper junos= 20.4nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 21.1nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-10-19modified 2026-06-17

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+11473 more

references (8)

External citations — patches, advisories, analysis.

scry

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