How severe is CVE-2026-33786?

CVE-2026-33786 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-33786 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33786?

CVE-2026-33786 primarily affects Juniper Junos. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-33786?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33786 have an EU (EUVD) identifier?

Yes. CVE-2026-33786 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21092.

When was CVE-2026-33786 published?

CVE-2026-33786 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-33786

CVE-2026-33786 is a medium-severity vulnerability in Juniper Junos with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-754.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 6.8
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21092
Weakness: CWE-754
Affected product: Juniper Junos
Published: 2026-04-09
Last modified: 2026-06-17

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis control daemon (chassisd) of Juniper Networks Junos OS on SRX1600, SRX2300 and SRX4300 allows a local attacker with low privileges to cause a complete Denial of Service (DoS). When a specific 'show chassis' CLI command is executed, chassisd crashes and restarts which causes a momentary impact to all traffic until all modules are online again. This issue affects Junos OS on SRX1600, SRX2300 and SRX4300: * 24.4 versions before 24.4R1-S3, 24.4R2. This issue does not affect Junos OS versions before 24.4R1.

Frequently asked questions

What is CVE-2026-33786?: An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis control daemon (chassisd) of Juniper Networks Junos OS on SRX1600, SRX2300 and SRX4300 allows a local attacker with low privileges to cause a complete Denial of Service (DoS). When a specific 'show chassis' CLI command is executed, chassisd crashes and restarts which causes a momentary impact to all traffic until all modules are online again. This issue affects Junos OS on SRX1600, SRX2300 and SRX4300: * 24.4 versions before 24.4R1-S3, 24.4R2. This issue does not affect Junos OS versions before 24.4R1.
How severe is CVE-2026-33786?: CVE-2026-33786 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-33786 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33786?: CVE-2026-33786 primarily affects Juniper Junos. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-33786?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33786 have an EU (EUVD) identifier?: Yes. CVE-2026-33786 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21092.
When was CVE-2026-33786 published?: CVE-2026-33786 was published on 2026-04-09 and last updated on 2026-06-17.

References

https://kb.juniper.net/JSA107810

Affected products (4)

cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:24.4:r2:*:*:*:*:*:*

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