How severe is CVE-2019-0009?

CVE-2019-0009 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-2019-0009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-0009?

CVE-2019-0009 primarily affects Juniper Junos. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-0009?

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

When was CVE-2019-0009 published?

CVE-2019-0009 was published on 2019-01-15 and last updated on 2026-06-17.

CVE-2019-0009

CVE-2019-0009 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.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Juniper Junos
Published: 2019-01-15
Last modified: 2026-06-17

Description

On EX2300 and EX3400 series, high disk I/O operations may disrupt the communication between the routing engine (RE) and the packet forwarding engine (PFE). In a virtual chassis (VC) deployment, this issue disrupts communication between the VC members. This issue does not affect other Junos platforms. Affected releases are Junos OS on EX2300 and EX3400 series: 15.1X53 versions prior to 15.1X53-D590; 18.1 versions prior to 18.1R2-S2, 18.1R3; 18.2 versions prior to 18.2R2.

Frequently asked questions

What is CVE-2019-0009?: On EX2300 and EX3400 series, high disk I/O operations may disrupt the communication between the routing engine (RE) and the packet forwarding engine (PFE). In a virtual chassis (VC) deployment, this issue disrupts communication between the VC members. This issue does not affect other Junos platforms. Affected releases are Junos OS on EX2300 and EX3400 series: 15.1X53 versions prior to 15.1X53-D590; 18.1 versions prior to 18.1R2-S2, 18.1R3; 18.2 versions prior to 18.2R2.
How severe is CVE-2019-0009?: CVE-2019-0009 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-2019-0009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-0009?: CVE-2019-0009 primarily affects Juniper Junos. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-0009?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-0009 published?: CVE-2019-0009 was published on 2019-01-15 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:o:juniper:junos:15.1x53:d50:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d51:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d52:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d55:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d57:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d58:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d59:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:18.2:*:*:*:*:*:*:*

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