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Cisco Identity Services Engine Multiple Vulnerabilities (cisco-sa-ise-multiauth-bypass-sgD2HbL4)

medium Nessus Plugin ID 349779

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, Cisco ISE is affected by multiple vulnerabilities.

 - A vulnerability in an API of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to read specific files on the underlying operating system of an affected device. (CVE-2026-76446)

 - A vulnerability in an API of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to read specificfiles on the underlying operating system of an affected device. This vulnerability is due to improper restriction of XML external entity references. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to read specificfiles on the affected system that the underlying process has permission to access. (CVE-2026-76446)

 - A vulnerability in the endpoint posture status reporting functionality of the guest portal web application of Cisco ISE could allow an unauthenticated, remote attacker to submit forged posture status events into the endpoint posture pipeline. (CVE-2026-76439)

 - A vulnerability in the endpoint posture status reporting functionality of the guest portal web application of Cisco ISE could allow an unauthenticated, remote attacker to submit forged posture status events into the endpoint posture pipeline. This vulnerability is due to insufficient authentication on an internal interface that is exposed through the guest portal. An attacker could exploit this vulnerability by sending a crafted request to an affected system. A successful exploit could allow the attacker to manipulate the posture status on the affected system. (CVE-2026-76439)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwu73771, CSCwu73786, CSCwu73808, CSCwu73832

See Also

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwu73771

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwu73786

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwu73808

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwu73832

http://www.nessus.org/u?71448875

Plugin Details

Severity: Medium

ID: 349779

File Name: cisco-sa-ise-multiauth-bypass-sgD2HbL4_CVE-2026-76439_CVE-2026-76446.nasl

Version: 1.1

Type: Local

Family: CISCO

Published: 9/24/2026

Updated: 9/24/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.3

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:N/A:N

CVSS Score Source: CVE-2026-76439

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:cisco:identity_services_engine, cpe:/a:cisco:identity_services_engine_software, cpe:/h:cisco:identity_services_engine

Required KB Items: Host/Cisco/ISE/version

Exploit Ease: No known exploits are available

Patch Publication Date: 9/16/2026

Vulnerability Publication Date: 9/16/2026

Reference Information

CVE: CVE-2026-76439, CVE-2026-76446