How severe is CVE-2019-0005?

CVE-2019-0005 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2019-0005 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-0005?

CVE-2019-0005 primarily affects Juniper Junos. In total, 88 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-0005?

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

When was CVE-2019-0005 published?

CVE-2019-0005 was published on 2019-01-15 and last updated on 2026-06-17.

CVE-2019-0005

CVE-2019-0005 is a medium-severity vulnerability in Juniper Junos with a CVSS 3.x base score of 5.3. 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-770.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Juniper Junos
Published: 2019-01-15
Last modified: 2026-06-17

Description

On EX2300, EX3400, EX4600, QFX3K and QFX5K series, firewall filter configuration cannot perform packet matching on any IPv6 extension headers. This issue may allow IPv6 packets that should have been blocked to be forwarded. IPv4 packet filtering is unaffected by this vulnerability. Affected releases are Juniper Networks Junos OS on EX and QFX series;: 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1R7; 15.1X53 versions prior to 15.1X53-D234 on QFX5200/QFX5110 series; 15.1X53 versions prior to 15.1X53-D591 on EX2300/EX3400 series; 16.1 versions prior to 16.1R7; 17.1 versions prior to 17.1R2-S10, 17.1R3; 17.2 versions prior to 17.2R3; 17.3 versions prior to 17.3R3; 17.4 versions prior to 17.4R2; 18.1 versions prior to 18.1R2.

Frequently asked questions

What is CVE-2019-0005?: On EX2300, EX3400, EX4600, QFX3K and QFX5K series, firewall filter configuration cannot perform packet matching on any IPv6 extension headers. This issue may allow IPv6 packets that should have been blocked to be forwarded. IPv4 packet filtering is unaffected by this vulnerability. Affected releases are Juniper Networks Junos OS on EX and QFX series;: 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1R7; 15.1X53 versions prior to 15.1X53-D234 on QFX5200/QFX5110 series; 15.1X53 versions prior to 15.1X53-D591 on EX2300/EX3400 series; 16.1 versions prior to 16.1R7; 17.1 versions prior to 17.1R2-S10, 17.1R3; 17.2 versions prior to 17.2R3; 17.3 versions prior to 17.3R3; 17.4 versions prior to 17.4R2; 18.1 versions prior to 18.1R2.
How severe is CVE-2019-0005?: CVE-2019-0005 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2019-0005 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-0005?: CVE-2019-0005 primarily affects Juniper Junos. In total, 88 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-0005?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-0005 published?: CVE-2019-0005 was published on 2019-01-15 and last updated on 2026-06-17.

References

Affected products (88)

cpe:2.3:o:juniper:junos:14.1x53:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d15:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d16:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d26:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d27:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d35:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d40:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d42:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d43:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d44:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d45:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d46:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d20:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d21:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d32:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d33:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d34:*:*:*:*:*:*
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:d210:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d230:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d234:*:*:*:*:*:*
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:15.1x53:d590:*:*:*:*:*:*

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