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U.S. CISA adds Cisco ISE and PaperCut NG/MF flaws to its Known Exploited Vulnerabilities catalog
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Cisco Identity Services Engine Authentication Bypass Vulnerabilities
Cisco fixed multiple authentication bypass flaws in Identity Services Engine and ISE-PIC enabling remote data access, manipulation, and certificate material disruption.
Multiple vulnerabilities in Cisco Identity Services Engine (ISE) and the ISE Passive Identity Connector (ISE-PIC) could allow a remote attacker to access or manipulate data, obtain sensitive information, or cause a reload of certificate and key material on affected devices. Cisco has released software updates, and no workarounds are available. The advisory is part of Cisco's September 2026 publication batch.
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ZDI-26-582: Cisco Identity Services Engine PatchUpdateListener Directory Traversal Information Disclosure Vulnerability
Cisco Identity Services Engine's PatchUpdateListener has an authenticated directory traversal (CVE-2026-20148, CVSS 4.9) enabling sensitive information disclosure.
ZDI advisory ZDI-26-582 describes a directory traversal information disclosure vulnerability in the PatchUpdateListener component of Cisco Identity Services Engine. Remote attackers can disclose sensitive information, but valid authentication is required to exploit the flaw. ZDI assigned a CVSS rating of 4.9 and CVE-2026-20148.
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Cisco Identity Services Engine Remote Code Execution Vulnerabilities
Cisco patched multiple authenticated remote code execution vulnerabilities in Identity Services Engine that require valid administrative credentials.
Multiple vulnerabilities in Cisco Identity Services Engine (ISE) allow an authenticated remote attacker with valid administrative credentials to execute arbitrary commands on the underlying operating system. Cisco has released software updates; no workarounds address these vulnerabilities. The advisory is part of a batch of ISE releases.
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Cisco Identity Services Engine SQL and HQL Injection Vulnerabilities
Cisco fixed multiple authenticated SQL and HQL injection flaws in Identity Services Engine and ISE-PIC APIs allowing arbitrary database queries and unauthorized data access.
Multiple vulnerabilities in Cisco Identity Services Engine (ISE) and ISE-PIC stem from insufficient validation of user-supplied input to affected APIs before it is used to build database queries. An authenticated, remote attacker can send crafted requests to execute arbitrary SQL or HQL queries against the underlying database, viewing or modifying data they are not authorized to access. Cisco has released software updates.
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Cisco Identity Services Engine 802.1X Session Hijack and Information Disclosure Vulnerabilities
Cisco patched Identity Services Engine flaws letting unauthenticated local attackers bypass 802.1X authentication or disclose sensitive information.
Multiple vulnerabilities in Cisco Identity Services Engine (ISE) could allow an unauthenticated local attacker to conduct an authentication bypass involving 802.1X session hijack or disclose sensitive information. Cisco has released software updates addressing these vulnerabilities. No workarounds are available. The advisory is part of a batch of Cisco releases.
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Cisco Identity Services Engine SQL Injection Vulnerabilities
Cisco released fixes for multiple SQL injection vulnerabilities in Identity Services Engine as part of its September 2026 advisory batch.
Multiple SQL injection vulnerabilities in Cisco Identity Services Engine (ISE) could allow a remote attacker to conduct SQL injection attacks against affected devices. Cisco has released software updates, and no workarounds address the flaws. The advisory is part of a group of advisories published in Cisco's September 2026 batch.
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Cisco Identity Services Engine Authentication Bypass Vulnerability
Cisco patched an unauthenticated API authentication bypass in Identity Services Engine allowing attackers to access the web-based management interface.
A vulnerability in an API of Cisco Identity Services Engine (ISE) stems from insufficient authentication control on an API endpoint. An unauthenticated remote attacker can send a crafted request to bypass authentication and gain unauthorized access to the device via the web-based management interface. Cisco has released software updates and no workarounds are available.
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ZDI-26-581: Cisco Identity Services Engine invokeScript Command Injection Remote Code Execution Vulnerability
ZDI details CVE-2026-20147, an authenticated command injection in Cisco Identity Services Engine allowing remote code execution, rated CVSS 7.2.
ZDI-26-581 describes a command injection flaw in Cisco Identity Services Engine reachable through the invokeScript function. Remote attackers who authenticate can execute arbitrary code on affected installations. The issue is tracked as CVE-2026-20147 and carries a CVSS rating of 7.2. No exploitation activity is reported in the advisory.
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ZDI-26-579: Cisco Identity Services Engine zipFiles Directory Traversal Remote Code Execution Vulnerability
ZDI disclosed an authenticated directory traversal flaw (CVE-2026-20181) in Cisco Identity Services Engine allowing remote code execution, CVSS 7.2.
The Zero Day Initiative published ZDI-26-579 describing a directory traversal in the zipFiles functionality of Cisco Identity Services Engine. Authenticated remote attackers can execute arbitrary code on affected installations. ZDI assigned a CVSS score of 7.2 and the identifier CVE-2026-20181.
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ZDI-26-580: Cisco Identity Services Engine Missing Authentication for Critical Function Information Disclosure Vulnerability
ZDI discloses CVE-2026-20190, a missing-authentication flaw in Cisco Identity Services Engine permitting unauthenticated sensitive information disclosure, rated CVSS 7.5.
ZDI-26-580 covers a missing authentication for critical function flaw in Cisco Identity Services Engine. Unauthenticated remote attackers can disclose sensitive information from affected installations. The vulnerability is tracked as CVE-2026-20190 and rated CVSS 7.5. The advisory does not indicate exploitation in the wild.
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Cisco Identity Services Engine RADIUS Denial of Service Vulnerability
Cisco patched a RADIUS flaw in Identity Services Engine letting unauthenticated remote attackers trigger denial of service on ISE nodes.
A vulnerability in the RADIUS feature of Cisco Identity Services Engine allows an unauthenticated remote attacker to cause a denial of service by sending crafted RADIUS requests directly to an affected device. The flaw stems from improper handling of certain RADIUS requests and can render ISE nodes unavailable. In single-node deployments, endpoints that have not yet authenticated would be unable to access the network until the node recovers. Cisco has released software updates addressing the issue.
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Cisco Identity Services Engine Hardening Release: September 2026
Cisco ISE hardening release fixes multiple internally discovered vulnerabilities, including an authentication bypass known to be actively exploited.
Cisco released September 2026 hardening updates for Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC) following a comprehensive internal security review that uncovered multiple vulnerabilities. One of the flaws, an ISE authentication bypass, is known to be actively exploited. Cisco grouped the issues by underlying vulnerability to help customers prioritize patching and streamline disclosure.
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Cisco Identity Services Engine Vulnerabilities
Cisco patched ISE and ISE-PIC flaws enabling REST API authentication bypass, remote code execution, SQL injection, and XXE attacks.
Multiple vulnerabilities in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow a remote attacker to bypass authentication to the REST API, achieve remote code execution, perform SQL injection, and conduct XML External Entity injection attacks. Cisco has released software updates; no workarounds address these vulnerabilities.
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Cisco Identity Services Engine Command Injection Vulnerabilities
Authenticated attackers with admin credentials could exploit Cisco ISE command injection flaws to execute arbitrary commands as root; fixes released.
Multiple command injection vulnerabilities in Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC) allow an authenticated, remote attacker with valid administrative credentials to execute arbitrary commands as the root user. Cisco has released software updates, and no workarounds are available. The advisory is part of a grouped set of September 2026 ISE advisories.
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Cisco Identity Services Engine Multiple Path Traversal Vulnerabilities
Cisco ISE and ISE-PIC contain multiple path traversal vulnerabilities allowing remote attacks; fixes released with no workarounds available.
Multiple path traversal vulnerabilities in Cisco Identity Services Engine (ISE) and the ISE Passive Identity Connector (ISE-PIC) could allow a remote attacker to conduct path traversal attacks on affected devices. Cisco has released software updates that address these vulnerabilities, and no workarounds are available. The advisory is part of a grouped set of September 2026 ISE advisories.
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Cisco Identity Services Engine Authorization Bypass Vulnerabilities
Cisco fixed authorization bypass flaws in ISE and ISE-PIC web management letting authenticated admins modify file descriptions via crafted HTTP requests.
Multiple vulnerabilities in the web-based management interface of Cisco Identity Services Engine and ISE Passive Identity Connector result from missing server-side validation of Administrator permissions. An authenticated remote attacker with valid Administrator credentials can submit crafted HTTP requests to modify descriptions of files on specific pages. Cisco has released software updates addressing the issues.
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Cisco Identity Services Engine Information Disclosure Vulnerability
Cisco patched an ISE API flaw letting an authenticated administrator view sensitive data including hashed credentials via crafted API requests.
A vulnerability in the Cisco Identity Services Engine API allows an authenticated remote attacker with valid administrative credentials to view sensitive information, including hashed credentials usable in future attacks. The flaw is caused by insufficient validation of user-supplied API request parameters. Cisco has released software updates.
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Cisco Identity Services Engine Authenticated Remote Code Execution and API Vulnerabilities
Cisco fixed ISE vulnerabilities enabling authenticated SQL injection and OS command execution; CVE-2026-20282 and CVE-2026-20283 rated High.
Multiple Cisco Identity Services Engine vulnerabilities allow an authenticated remote attacker to conduct SQL injection, modify data, or execute arbitrary commands on the underlying OS. Cisco assigned a Security Impact Rating of High to CVE-2026-20282 and CVE-2026-20283 because attackers can easily reach root from the achieved privilege level. Software updates are available and a workaround addresses one of the vulnerabilities.
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Cisco Identity Services Engine Cross-Site Scripting Vulnerability
Cisco patched a reflected XSS in the ISE management interface allowing unauthenticated attackers to execute script via crafted links.
A reflected cross-site scripting vulnerability in the web-based management interface of Cisco Identity Services Engine lets an unauthenticated remote attacker execute arbitrary script in the context of the interface. Exploitation requires persuading a user to click a crafted link due to improper input validation. Cisco has released software updates.
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CISA Adds Two Known Exploited Vulnerabilities to Catalognew
CISA added actively exploited CVE-2026-76460 (Cisco Identity Services Engine) and CVE-2026-87886 (Acronis Backup) to its KEV catalog.
CISA added two vulnerabilities to its Known Exploited Vulnerabilities Catalog based on evidence of active exploitation: CVE-2026-76460, an incorrect use of privileged APIs flaw in Cisco Identity Services Engine, and CVE-2026-87886, an incorrect default permissions flaw in Acronis Backup. Under Binding Operational Directive 26-04, Federal Civilian Executive Branch agencies must prioritize rapid remediation of KEV vulnerabilities on publicly exposed assets that grant total control post-exploitation, and check whether systems were compromised before patching.
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Critical Patches Issued for Cisco Expressway Series, TelePresence VCS Products
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Cisco Issues Urgent Fix for Authentication Bypass Bug Affecting BroadWorks Platform
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