CVE-2023-36849

mediumpriority · track · 0EPSS 0.003 · 22 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.30% (22nd) EPSS

CVSS 6.5 · medium

Is it mine?

39 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-22

An Improper Check or Handling of Exceptional Conditions vulnerability in the Layer-2 control protocols daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a Denial of Service (DoS). When a malformed LLDP packet is received, l2cpd will crash and restart. The impact of the l2cpd crash is reinitialization of STP protocols (RSTP, MSTP or VSTP), and MVRP and ERP. Also, if any services depend on LLDP state (like PoE or VoIP device recognition), then these will also be affected. Continued receipt of such packets will lead to a sustained Denial of Service. This issue affects: Juniper Networks Junos OS 21.4 versions prior to 21.4R3-S3; 22.1 versions prior to 22.1R3-S3; 22.2 versions prior to 22.2R2-S1, 22.2R3; 22.3 versions prior to 22.3R2. Juniper Networks Junos OS Evolved 21.4-EVO versions prior to 21.4R3-S2-EVO; 22.1-EVO versions prior to 22.1R3-S3-EVO; 22.2-EVO versions prior to 22.2R2-S1-EVO, 22.2R3-EVO; 22.3-EVO versions prior to 22.3R2-EVO.

cvss

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

6.5

010

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

v3.16.5mediumAV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · sirt@juniper.net USexploitability 2.8 · impact 3.6

v3.16mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-703USCWE-703US

affected products (39)

Products and version ranges known to be affected.

Juniper JUNOSall versionscert_bundDEcpe:/o:juniper:junos:-
Juniper JUNOS Contrail Cloudall versionscert_bundDEcpe:/o:juniper:junos:contrail_cloud
Juniper JUNOS Evolvedall versionscert_bundDEcpe:/o:juniper:junos:evolved
Juniper JUNOS PTX10001-36MRall versionscert_bundDEcpe:/o:juniper:junos:ptx10001-36mr
Juniper JUNOS PTX10004all versionscert_bundDEcpe:/o:juniper:junos:ptx10004
Juniper JUNOS PTX10008all versionscert_bundDEcpe:/o:juniper:junos:ptx10008
Juniper JUNOS PTX10016all versionscert_bundDEcpe:/o:juniper:junos:ptx10016
Juniper JUNOS Spaceall versionscert_bundDEcpe:/o:juniper:junos:space
Juniper MX Seriesall versionscert_bundDEcpe:/h:juniper:mx:-
Juniper QFX Series QFX10000all versionscert_bundDEcpe:/h:juniper:qfx:qfx10000
Juniper SRX Seriesall versionscert_bundDEcpe:/h:juniper:srx_service_gateways:-
Juniper SRX Series 4600all versionscert_bundDEcpe:/h:juniper:srx_service_gateways:4600
Juniper SRX Series 5000all versionscert_bundDEcpe:/h:juniper:srx_service_gateways:5000
Juniper Networks Junos OS21.4 → 21.4R3-S3enisa_euvdEU
Juniper Networks Junos OS22.1 → 22.1R3-S3enisa_euvdEU
Juniper Networks Junos OS22.2 → 22.2R2-S1, 22.2R3enisa_euvdEU
Juniper Networks Junos OS22.3 → 22.3R2enisa_euvdEU
Juniper Networks Junos OS Evolved21.4 → 21.4R3-S2-EVOenisa_euvdEU
Juniper Networks Junos OS Evolved22.1 → 22.1R3-S3-EVOenisa_euvdEU
Juniper Networks Junos OS Evolved22.2 → 22.2R2-S1-EVO, 22.2R3-EVOenisa_euvdEU

showing 20 of 39

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1737Juniper Patchday Juli 2023Deutsch2023-07-12csaf · cert_bundDE
Ein Angreifer aus dem angrenzenden Netzwerk oder ein entfernter anonymer oder lokaler Angreifer kann mehrere Schwachstellen in verschiedenen Juniper Produkten ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand auszulösen und seine Privilegien zu erweitern.

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 2023-07-14modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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