Cisco Unified Communications Manager Web Interface Vulnerable to Reflected XSS
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Cisco disclosed a cross-site scripting (XSS) vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM) and Unified CM Session Management Edition (Unified CM SME). The flaw stems from improper validation of user-supplied input in the interface, allowing an unauthenticated remote attacker to craft a malicious link that, when clicked by a user, executes arbitrary script code in the browser context of the interface or exposes sensitive browser-based information. Exploitation requires social engineering (persuading a victim to click the crafted link), which lowers the overall risk compared to unauthenticated server-side attacks. Cisco rated the Security Impact as Medium and has released software updates to address the issue, with no available workarounds.
Entenda a falha
A vulnerabilidade
CVE-2026-76419 is a cross-site scripting (XSS) flaw in the web-based management interface of Cisco Unified Communications Manager (Unified CM) and Unified CM Session Management Edition (Unified CM SME). An unauthenticated remote attacker needs a user of the interface to click a crafted link. The attacker can then run arbitrary script code in the context of the interface or read sensitive browser-based information. Cisco rates the impact Medium, has released software updates and says there are no workarounds. The articles do not list affected or fixed version numbers.
Como funciona
The attacker builds a link that points to the management interface and carries input crafted by the attacker. When a user of the interface clicks it, the web interface receives that input. It does not validate the input properly and it ends up in the page the browser renders. The browser then runs it as script in the context of the interface. The story calls it reflected, and also stored in one place, while the Cisco advisory does not say which.
Por que é vulnerável
The root cause is that the web-based management interface does not properly validate user-supplied input, so attacker-controlled data is treated as trusted content in the page. Cisco's software updates address it, but the articles do not describe what the fix changes or why the flaw went unnoticed.
Como foi descoberta
The articles do not say who found the flaw or how. Cisco disclosed it in the security advisory cisco-sa-cucm-xss-5mQn2U5z, published on 2026-11-04, together with software updates. The advisory does 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 (CVE-2026-76419) is a reflected/stored XSS condition caused by insufficient input sanitization in the Unified CM web management interface. Successful exploitation allows script execution in the context of the affected interface, potentially enabling session hijacking, credential theft, or further client-side attacks against administrators using the interface.
Remediação
Cisco has released software updates to fix the vulnerability. No workarounds exist, so affected organizations must apply the vendor-provided patches to Unified CM and Unified CM SME deployments.
Linha do tempo
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sec.cloudapps.cisco.com ↗ · pub. 04/11/2026 13:00 · coletado 04/11 14:00 primeiro registro só resumo do feed
Cisco Unified Communications Manager Web Interface Vulnerable to Reflected XSS
ler a análise desta fonte ocultar
Cisco disclosed a cross-site scripting (XSS) vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM) and Unified CM Session Management Edition (Unified CM SME). The flaw stems from improper validation of user-supplied input in the interface, allowing an unauthenticated remote attacker to craft a malicious link that, when clicked by a user, executes arbitrary script code in the browser context of the interface or exposes sensitive browser-based information. Exploitation requires social engineering (persuading a victim to click the crafted link), which lowers the overall risk compared to unauthenticated server-side attacks. Cisco rated the Security Impact as Medium and has released software updates to address the issue, with no available workarounds.
Technical Details
The vulnerability (CVE-2026-76419) is a reflected/stored XSS condition caused by insufficient input sanitization in the Unified CM web management interface. Successful exploitation allows script execution in the context of the affected interface, potentially enabling session hijacking, credential theft, or further client-side attacks against administrators using the interface.
Remediation
Cisco has released software updates to fix the vulnerability. No workarounds exist, so affected organizations must apply the vendor-provided patches to Unified CM and Unified CM SME deployments.