Cisco ISE Authorization Bypass Lets Unauthenticated Attackers Obtain Endpoint Certificates
Baseado só no resumo do feed. O site da fonte não liberou o texto completo para o Tifon, então esta análise saiu apenas do resumo publicado no feed e pode estar incompleta. Ela é atualizada quando outra fonte cobrir o assunto. Ler na fonte original ↗
Cisco has disclosed an authorization bypass vulnerability in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) that could allow an unauthenticated, remote attacker to obtain an endpoint identity certificate. The flaw, tracked as CVE-2026-20241, stems from improper authorization checks in the certificate issuance mechanism. An attacker can exploit the issue by sending a crafted request to an affected device, with no authentication required. Cisco rates this a Medium Security Impact Rating and has released software updates to address the vulnerability; no workarounds are available.
Entenda a falha
A vulnerabilidade
CVE-2026-20241 is an authorization bypass in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC), in the authorization mechanism tied to certificate issuance. An unauthenticated, remote attacker who can reach an affected device and send a crafted request can obtain an endpoint identity certificate. Cisco rates it Medium. Cisco says software updates fix it and there are no workarounds; the articles do not list affected or fixed version numbers.
Como funciona
A request reaches the ISE or ISE-PIC device and goes to the authorization mechanism that decides whether a caller may be issued an endpoint identity certificate. With a crafted request, the authorization decision does not hold, so the device treats the request as allowed. The result is that a certificate is issued to a caller who should not have received one. The articles give no further detail on the exact endpoint or request flow.
Por que é vulnerável
According to Cisco, the root cause is improper authorization checks in the certificate issuance mechanism: the software does not properly verify that the requester is entitled to a certificate. The story notes this could undermine trust-based network access decisions, since endpoint certificates are used as proof of identity. Cisco's updates fix the checks; the articles do not describe the code-level change or why it went unnoticed.
Como foi descoberta
The articles do not say who found the flaw or how. Cisco disclosed it through a Security Advisory (cisco-sa-ise-cert-mE9BD5GO) published on 2026-11-04, together with software updates. The articles do not mention exploitation in the wild.
Explicação gerada por IA a partir da matéria e dos artigos, em 04/11/2026 14:17.
Detalhes técnicos
The vulnerability resides in the authorization mechanism of Cisco ISE/ISE-PIC, where improper checks allow a remote, unauthenticated attacker to bypass authorization controls and obtain a valid endpoint identity certificate via a specially crafted request, potentially undermining trust-based network access decisions.
Remediação
Cisco has released software updates that remediate CVE-2026-20241. No workarounds exist, so affected organizations should apply the patched releases as soon as possible.
Linha do tempo
-
sec.cloudapps.cisco.com ↗ · pub. 04/11/2026 13:00 · coletado 04/11 14:00 primeiro registro só resumo do feed
Cisco ISE Authorization Bypass Lets Unauthenticated Attackers Obtain Endpoint Certificates
ler a análise desta fonte ocultar
Cisco has disclosed an authorization bypass vulnerability in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) that could allow an unauthenticated, remote attacker to obtain an endpoint identity certificate. The flaw, tracked as CVE-2026-20241, stems from improper authorization checks in the certificate issuance mechanism. An attacker can exploit the issue by sending a crafted request to an affected device, with no authentication required. Cisco rates this a Medium Security Impact Rating and has released software updates to address the vulnerability; no workarounds are available.
Technical Details
The vulnerability resides in the authorization mechanism of Cisco ISE/ISE-PIC, where improper checks allow a remote, unauthenticated attacker to bypass authorization controls and obtain a valid endpoint identity certificate via a specially crafted request, potentially undermining trust-based network access decisions.
Remediation
Cisco has released software updates that remediate CVE-2026-20241. No workarounds exist, so affected organizations should apply the patched releases as soon as possible.