CVE-2019-1757: Cisco IOS and IOS XE Software Smart Call Home Certificate Validation Vulnerability

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-03-28 · updated 2026-06-17
Weakness: CWE-295

Description

A vulnerability in the Cisco Smart Call Home feature of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to gain unauthorized read access to sensitive data using an invalid certificate. The vulnerability is due to insufficient certificate validation by the affected software. An attacker could exploit this vulnerability by supplying a crafted certificate to an affected device. A successful exploit could allow the attacker to conduct man-in-the-middle attacks to decrypt confidential information on user connections to the affected software.

Affected products

Cisco IOS: 2.3, 12.2(6)i1, 12.4(25e)jap1m, 12.4(25e)jap2, 12.4(25e)jap26, 12.4(25e)jaz1 (+125)
Cisco IOS XE: 3.6.4e, 3.6.5ae, 3.6.5be, 3.6.5e, 3.6.6e, 3.6.7ae (+102)

References

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