CVE-2024-39530

highpriority · track · 30EPSS 0.005 · 41 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.48% (41st) EPSS

CVSS 7.5 · high

Is it mine?

22 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis management daemon (chassisd) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). If an attempt is made to access specific sensors on platforms not supporting these sensors, either via GRPC or netconf, chassisd will crash and restart leading to a restart of all FPCs and thereby a complete outage. This issue affects Junos OS: * 21.4 versions from 21.4R3 before 21.4R3-S5, * 22.1 versions from 22.1R3 before 22.1R3-S4, * 22.2 versions from 22.2R2 before 22.2R3, * 22.3 versions from 22.3R1 before 22.3R2-S2, 22.3R3, * 22.4 versions from 22.4R1 before 22.4R2. This issue does not affect Junos OS versions earlier than 21.4.

cvss

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

8.7

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7

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

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · sirt@juniper.net USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · NCSC-NL NL

v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · sirt@juniper.net US

v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Lsecondary · ENISA EU

v4.06.6mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754USprimaryCWE-754USCWE-754US

affected products (22)

Products and version ranges known to be affected.

Juniper JUNOSall versionscert_bundDEcpe:/o:juniper:junos:-
Juniper Networks Junos OS21.4R3 → 21.4R3-S5enisa_euvdEU
Juniper Networks Junos OS22.1R3 → 22.1R3-S4enisa_euvdEU
Juniper Networks Junos OS22.2R2 → 22.2R3enisa_euvdEU
Juniper Networks Junos OS22.3R1 → 22.3R2-S2, 22.3R3enisa_euvdEU
Juniper Networks Junos OS22.4R1 → 22.4R2enisa_euvdEU
Juniper Networks Inc. JunOS21.4R3 → 21.4R3-S5fstec_bduRU
Juniper Networks Inc. JunOS22.1R3 → 22.1R3-S4fstec_bduRU
Juniper Networks Inc. JunOS22.2R2 → 22.2R3fstec_bduRU
Juniper Networks Inc. JunOS22.3R1 → 22.3R2-S2fstec_bduRU
Juniper Networks Inc. JunOS22.3R1 → 22.3R3fstec_bduRU
Juniper Networks Inc. JunOS22.4R1 → 22.4R2fstec_bduRU
junos_osall versionsncsc_nlNLcpe:2.3:a:juniper_networks:junos_os:22.2r2:*:*:*:*:*:*:*
junos_osall versionsncsc_nlNLcpe:2.3:a:juniper_networks:junos_os:21.4r3:*:*:*:*:*:*:*
junos_osall versionsncsc_nlNLcpe:2.3:a:juniper_networks:junos_os:22.1r3:*:*:*:*:*:*:*
junos_osall versionsncsc_nlNLcpe:2.3:a:juniper_networks:junos_os:22.3r1:*:*:*:*:*:*:*
junos_osall versionsncsc_nlNLcpe:2.3:a:juniper_networks:junos_os:22.4r1:*:*:*:*:*:*:*
juniper junos= 21.1nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 21.4nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 22.2nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*

showing 20 of 22

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2024-0290Kwetsbaarheden verholpen in Juniper Junos OS en Junos OS EvolvedNL2024-07-12csaf · ncsc_nlNL
Er zijn kwetsbaarheden gevonden en verholpen in Juniper Junos OS en Junos OS Evolved.
WID-SEC-W-2024-1591Juniper JUNOS: Mehrere SchwachstellenDeutsch2024-07-10csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Juniper JUNOS ausnutzen, um einen Denial of Service zu verursachen, Informationen offenzulegen, Privilegien zu erweitern und Sicherheitsmechanismen inklusive zu umgehen.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl nvd NVD CVE.org MITRE

published 2024-07-11modified 2026-06-17

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references (4)

External citations — patches, advisories, analysis.

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