How severe is CVE-2019-0043?

CVE-2019-0043 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-0043 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-0043?

CVE-2019-0043 primarily affects Juniper Junos. In total, 175 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-0043?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-0043 published?

CVE-2019-0043 was published on 2019-04-10 and last updated on 2026-06-17.

CVE-2019-0043

CVE-2019-0043 is a high-severity vulnerability in Juniper Junos with a CVSS 3.x base score of 7.5. 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-404.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-404
Affected product: Juniper Junos
Published: 2019-04-10
Last modified: 2026-06-17

Description

In MPLS environments, receipt of a specific SNMP packet may cause the routing protocol daemon (RPD) process to crash and restart. By continuously sending a specially crafted SNMP packet, an attacker can repetitively crash the RPD process causing prolonged denial of service. No other Juniper Networks products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS : 12.1X46 versions prior to 12.1X46-D77 on SRX Series; 12.3 versions prior to 12.3R12-S10; 12.3X48 versions prior to 12.3X48-D75 on SRX Series; 14.1X53 versions prior to 14.1X53-D48 on EX/QFX series; 15.1 versions prior to 15.1R4-S9, 15.1R7-S2; 15.1F6 versions prior to 15.1F6-S11; 15.1X49 versions prior to 15.1X49-D141, 15.1X49-D144, 15.1X49-D150 on SRX Series; 15.1X53 versions prior to 15.1X53-D234 on QFX5200/QFX5110 Series; 15.1X53 versions prior to 15.1X53-D68 on QFX10K Series; 15.1X53 versions prior to 15.1X53-D471, 15.1X53-D490 on NFX Series; 15.1X53 versions prior to 15.1X53-D590 on EX2300/EX3400 Series; 15.1X54 on ACX Series; 16.1 versions prior to 16.1R3-S10, 16.1R4-S11, 16.1R6-S5, 16.1R7; 16.1X65 versions prior to 16.1X65-D48; 16.2 versions prior to 16.2R2-S6; 17.1 versions prior to 17.1R2-S8, 17.1R3; 17.2 versions prior to 17.2R1-S7, 17.2R3; 17.2X75 versions prior to 17.2X75-D92, 17.2X75-D102, 17.2X75-D110; 17.3 versions prior to 17.3R3; 17.4 versions prior to 17.4R1-S4, 17.4R2; 18.1 versions prior to 18.1R1-S1, 18.1R2-S1, 18.1R3; 18.2X75 versions prior to 18.2X75-D10.

Frequently asked questions

What is CVE-2019-0043?: In MPLS environments, receipt of a specific SNMP packet may cause the routing protocol daemon (RPD) process to crash and restart. By continuously sending a specially crafted SNMP packet, an attacker can repetitively crash the RPD process causing prolonged denial of service. No other Juniper Networks products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS : 12.1X46 versions prior to 12.1X46-D77 on SRX Series; 12.3 versions prior to 12.3R12-S10; 12.3X48 versions prior to 12.3X48-D75 on SRX Series; 14.1X53 versions prior to 14.1X53-D48 on EX/QFX series; 15.1 versions prior to 15.1R4-S9, 15.1R7-S2; 15.1F6 versions prior to 15.1F6-S11; 15.1X49 versions prior to 15.1X49-D141, 15.1X49-D144, 15.1X49-D150 on SRX Series; 15.1X53 versions prior to 15.1X53-D234 on QFX5200/QFX5110 Series; 15.1X53 versions prior to 15.1X53-D68 on QFX10K Series; 15.1X53 versions prior to 15.1X53-D471, 15.1X53-D490 on NFX Series; 15.1X53 versions prior to 15.1X53-D590 on EX2300/EX3400 Series; 15.1X54 on ACX Series; 16.1 versions prior to 16.1R3-S10, 16.1R4-S11, 16.1R6-S5, 16.1R7; 16.1X65 versions prior to 16.1X65-D48; 16.2 versions prior to 16.2R2-S6; 17.1 versions prior to 17.1R2-S8, 17.1R3; 17.2 versions prior to 17.2R1-S7, 17.2R3; 17.2X75 versions prior to 17.2X75-D92, 17.2X75-D102, 17.2X75-D110; 17.3 versions prior to 17.3R3; 17.4 versions prior to 17.4R1-S4, 17.4R2; 18.1 versions prior to 18.1R1-S1, 18.1R2-S1, 18.1R3; 18.2X75 versions prior to 18.2X75-D10.
How severe is CVE-2019-0043?: CVE-2019-0043 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-0043 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-0043?: CVE-2019-0043 primarily affects Juniper Junos. In total, 175 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-0043?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-0043 published?: CVE-2019-0043 was published on 2019-04-10 and last updated on 2026-06-17.

References

https://kb.juniper.net/JSA10935

Affected products (175)

cpe:2.3:o:juniper:junos:12.1x46:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d15:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d20:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d35:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d40:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d45:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d50:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d55:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d60:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d65:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d66:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d67:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.1x46:d71:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r11:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r12:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r12-s8:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r7:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r8:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3:r9:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d15:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d20:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d35:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d40:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d45:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d50:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:12.3x48:d55:*:*:*:*:*:*

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