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4.9
MEDIUM CVSS 3.1
CVE-2026-76434
Cisco Identity Services Engine Arbitrary File Read Vulnerability
Overview
Description

A vulnerability in the certificate import functionality of the web-based management interface of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to read arbitrary files from the affected system. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient validation of user-supplied input by the affected feature. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to read arbitrary files from the affected device, which could contain sensitive information.

Details
INFO

Published Date :

Sept. 16, 2026, 9:17 p.m.

Last Modified :

Sept. 28, 2026, 1:14 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-76434 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Cisco identity_services_engine
2 Cisco identity_services_engine_software
3 Cisco identity_services_engine_passive_identity_connector
: Total Affected Vendor : 1 | Products : 3
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 MEDIUM MITRE-CVE
CVSS 3.1 MEDIUM [email protected]
Solution
Apply vendor patches to fix certificate import vulnerability and prevent arbitrary file reads.
  • Update Cisco ISE and Cisco ISE-PIC to patched versions.
  • Restrict access to the management interface.
  • Monitor for suspicious file access activity.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-76434.

URL Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-traversal-WDTgYCdn Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-76434 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-76434 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-76434 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-76434 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Sep. 28, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:cisco:identity_services_engine:3.4.0:-:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch1:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch2:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch3:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch4:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch5:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch1:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch6:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch2:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch3:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch7:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch4:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch5:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.5.0:-:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch1:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch2:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch10:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch8:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch9:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch3:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch11:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch6:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:* versions from (including) 3.1.0 up to (excluding) 3.3.0
    Added CPE Configuration OR *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch1:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch2:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch3:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch4:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch5:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:-:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch1:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch6:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch2:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch3:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch4:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch5:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch10:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch7:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch8:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch9:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch11:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch6:*:*:*:*:*:* *cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:*:*:*:*:*:*:*:* versions from (including) 3.1.0 up to (excluding) 3.3.0
    Added Reference Type Cisco Systems, Inc.: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-traversal-WDTgYCdn Types: Vendor Advisory
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 17, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-76434', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-09-17T16:00:22.904637Z'}
  • New CVE Received by [email protected]

    Sep. 16, 2026

    Action Type Old Value New Value
    Added Description A vulnerability in the certificate import functionality of the web-based management interface of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to read arbitrary files from the affected system. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient validation of user-supplied input by the affected feature. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to read arbitrary files from the affected device, which could contain sensitive information.
    Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
    Added CWE CWE-22
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76434.json">CVE-2026-76434</a>
    Added Reference https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-traversal-WDTgYCdn
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 4.9
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact