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Cisco Unity Connection Vulnerabilities Enable Code Execution and SSRF Attacks

Cisco Unity Connection Vulnerabilities Enable Code Execution and SSRF Attacks

First seen 7 May 2026, 15:53 UTC

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ThreatCluster AI
ThreatCluster May 8, 2026 at 15:39 UTC

Cisco has released security advisories addressing multiple high-severity vulnerabilities in its Unity Connection product. The most critical flaws allow authenticated attackers to inject and execute malicious code through manipulated API requests, while unauthenticated actors can perform Server-Side Request Forgery (SSRF) attacks. Additionally, vulnerabilities in Cisco's Managed Switches and IoT Field Network Director could lead to Denial-of-Service attacks. Cisco has issued patches for these vulnerabilities, with CVE-2026-20034 and CVE-2026-20035 being particularly noteworthy. The flaws affect various enterprise products, posing significant risks to organizations using these systems. Administrators are advised to apply the patches promptly to mitigate potential exploits.

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Timeline

2026-05-07
Cisco releases security advisories
Cisco disclosed multiple high-severity vulnerabilities in Unity Connection and other products, urging immediate patching.
Heise.De
2026-05-07
Patches issued for critical vulnerabilities
Cisco released patches for vulnerabilities including CVE-2026-20034 and CVE-2026-20035, addressing SSRF and code execution risks.
Securityaffairs.Co
2026-05-08
Details on vulnerabilities published
HKCERT provided detailed information on multiple vulnerabilities in Cisco Unity Connection, highlighting remote code execution and privilege escalation risks.
Hkcert

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