Cisco Identity Services Engine Software 3.4.0/3.5.0 Traffic improper authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco Identity Services Engine Software and ISE Passive Identity Connector 3.4.0/3.5.0. It has been classified as critical. Impacted is an unknown function of the component Traffic Handler. Performing a manipulation results in improper authorization. This vulnerability is cataloged as CVE-2026-20190. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Cisco Identity Services Engine Software and ISE Passive Identity Connector 3.4.0/3.5.0. This affects an unknown code block of the component Traffic Handler. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality. The summary by CVE is:

A vulnerability in Cisco ISE and ISE-PIC could allow an unauthenticated, remote attacker to view sensitive information on an affected device. This vulnerability is due to improper authorization checks when a resource is accessed. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to sensitive information, including hashed credentials that could be used in future attacks.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2026-20190 since 10/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/18/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 321491 (Cisco Identity Services Engine (cisco-sa-ise-multi-G5WP8vv)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (321491), EUVD (EUVD-2026-37749) and CERT Bund (WID-SEC-2026-1989). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Cisco Identity Services Engine (ISE)

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (cisco): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authorization
CWE: CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 321491
Nessus Name: Cisco Identity Services Engine (cisco-sa-ise-multi-G5WP8vv)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/08/2025 CVE reserved
06/17/2026 +252 days Advisory disclosed
06/17/2026 +0 days VulDB entry created
06/18/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-ise-multi-G5WP8vv
Status: Confirmed

CVE: CVE-2026-20190 (🔒)
GCVE (CVE): GCVE-0-2026-20190
GCVE (VulDB): GCVE-100-372069
EUVD: 🔒
CERT Bund: WID-SEC-2026-1989 - Cisco ISE and Cisco ISE-PIC: Mehrere Schwachstellen

Entryinfo

Created: 06/17/2026 18:49
Updated: 06/18/2026 14:06
Changes: 06/17/2026 18:49 (65), 06/17/2026 20:41 (1), 06/18/2026 11:33 (7), 06/18/2026 14:06 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

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