How severe is CVE-2019-1737?

CVE-2019-1737 has a CVSS 3.x base score of 8.6, 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-2019-1737 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-1737?

CVE-2019-1737 primarily affects Cisco Ios Xe. In total, 615 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-1737?

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-2019-1737 published?

CVE-2019-1737 was published on 2019-03-27 and last updated on 2026-06-17.

CVE-2019-1737

CVE-2019-1737 is a high-severity vulnerability in Cisco Ios Xe with a CVSS 3.x base score of 8.6. 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: High (CVSS 3.x base score 8.6)
CVSS v2: 7.8
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Cisco Ios Xe
Published: 2019-03-27
Last modified: 2026-06-17

Description

A vulnerability in the processing of IP Service Level Agreement (SLA) packets by Cisco IOS Software and Cisco IOS XE software could allow an unauthenticated, remote attacker to cause an interface wedge and an eventual denial of service (DoS) condition on the affected device. The vulnerability is due to improper socket resources handling in the IP SLA responder application code. An attacker could exploit this vulnerability by sending crafted IP SLA packets to an affected device. An exploit could allow the attacker to cause an interface to become wedged, resulting in an eventual denial of service (DoS) condition on the affected device.

Frequently asked questions

What is CVE-2019-1737?: A vulnerability in the processing of IP Service Level Agreement (SLA) packets by Cisco IOS Software and Cisco IOS XE software could allow an unauthenticated, remote attacker to cause an interface wedge and an eventual denial of service (DoS) condition on the affected device. The vulnerability is due to improper socket resources handling in the IP SLA responder application code. An attacker could exploit this vulnerability by sending crafted IP SLA packets to an affected device. An exploit could allow the attacker to cause an interface to become wedged, resulting in an eventual denial of service (DoS) condition on the affected device.
How severe is CVE-2019-1737?: CVE-2019-1737 has a CVSS 3.x base score of 8.6, 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-2019-1737 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-1737?: CVE-2019-1737 primarily affects Cisco Ios Xe. In total, 615 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-1737?: 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-2019-1737 published?: CVE-2019-1737 was published on 2019-03-27 and last updated on 2026-06-17.

References

Affected products (615)

cpe:2.3:o:cisco:ios_xe:3.2.0se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.2.1se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.2.2se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.2.3se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.0se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.0xo:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.1se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.1xo:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.2se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.2xo:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.3se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.4se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3.5se:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.0sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.1sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.2sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.3sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.4sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.5sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.6sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.7sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4.8sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5.0e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5.1e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5.2e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5.3e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.0ae:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.0be:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.0e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.1e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.2ae:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.2e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.3e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.4e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.5ae:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.5be:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.5e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.6e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.7ae:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6.7be:*:*:*:*:*:*:*

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