CVE-2023-36851

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.011 · 66 %ileDEEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV

Likely / severe?

1.12% (66th) EPSS

CVSS 5.3 · medium

Is it mine?

28 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2023-11-13remediate by 2023-11-17

required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

EPSS · scored 2026-10-27

Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability

A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to webauth_operation.php that doesn't require authentication, an attacker is able to upload and download arbitrary files via J-Web, leading to a loss of integrity or confidentiality, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on SRX Series: * 21.2 versions prior to 21.2R3-S8; * 21.4 versions prior to 21.4R3-S6; * 22.1 versions prior to 22.1R3-S5; * 22.2 versions prior to 22.2R3-S3; * 22.3 versions prior to 22.3R3-S2; * 22.4 versions prior to 22,4R2-S2, 22.4R3; * 23.2 versions prior to 23.2R1-S2, 23.2R2.

cvss

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

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · sirt@juniper.net USexploitability 3.9 · impact 1.4

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USprimaryCWE-306US

ATT&CK techniques

ATT&CK techniques this enables or maps to.

affected products (28)

Products and version ranges known to be affected.

Juniper EX Seriesall versionscert_bundDEcpe:/h:juniper:ex:-
Juniper SRX Seriesall versionscert_bundDEcpe:/h:juniper:srx_service_gateways:-
Juniper Networks Junos OS21.2 → 21.2R3-S8enisa_euvdEU
Juniper Networks Junos OS21.4 → 21.4R3-S6enisa_euvdEU
Juniper Networks Junos OS22.1 → 22.1R3-S5enisa_euvdEU
Juniper Networks Junos OS22.2 → 22.2R3-S3enisa_euvdEU
Juniper Networks Junos OS22.3 → 22.3R3-S2enisa_euvdEU
Juniper Networks Junos OS22.4 → 22.4R2-S2, 22.4R3enisa_euvdEU
Juniper Networks Junos OS23.2 → 23.2R1-S2, 23.2R2enisa_euvdEU
Juniper Networks Inc. JunOS≤ 20.4R3-S9fstec_bduRU
Juniper Networks Inc. JunOS21.1 → 21.2R3-S7fstec_bduRU
Juniper Networks Inc. JunOS21.3 → 21.3R3-S5fstec_bduRU
Juniper Networks Inc. JunOS21.4 → 21.4R3-S5fstec_bduRU
Juniper Networks Inc. JunOS22.1 → 22.1R3-S4fstec_bduRU
Juniper Networks Inc. JunOS22.2 → 22.2R3-S2fstec_bduRU
Juniper Networks Inc. JunOS22.3 → 22.3R3-S1fstec_bduRU
Juniper Networks Inc. JunOS22.3 → 22.3R2-S2fstec_bduRU
Juniper Networks Inc. JunOS22.4 → 22.4R3fstec_bduRU
Juniper Networks Inc. JunOS22.4 → 22.4R2-S1fstec_bduRU
Juniper Networks Inc. JunOS23.2 → 23.2R2fstec_bduRU

showing 20 of 28

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2092Juniper JUNOS: Mehrere Schwachstellen ermöglichen CodeausführungDeutsch2023-08-17csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Juniper JUNOS auf Geräten der EX- und SRX Serie ausnutzen, um beliebigen Programmcode auszuführen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2023-09-27modified 2026-06-17

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references (8)

External citations — patches, advisories, analysis.

scry

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