CVE-2019-1748: Cisco IOS and IOS XE Software Network Plug-and-Play Agent Certificate Validation Vulnerability

Severity: high (CVSS 7.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% 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 Network Plug-and-Play (PnP) agent of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data. The vulnerability exists because the affected software insufficiently validates certificates. 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 and modify confidential information on user connections to the affected software.

Affected products

Cisco IOS: 12.0(1), 12.0(1)t, 12.0(1)t1, 12.0(1)xe, 12.0(1a), 12.0(2) (+743)
Cisco IOS XE: 3.3.0se, 3.3.0xo, 3.3.1se, 3.3.1xo, 3.3.2se, 3.3.2xo (+175)

References

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