CVE-2015-6420: Serialized-object interfaces in certain Cisco Collaboration and Social Media; Endpoint Clients and Client S...

Security readout for executives and security teams

This is a Cisco Java deserialization issue tied to Apache Commons Collections. If an affected Cisco product exposes the vulnerable serialized-object interface, a remote attacker may be able to run arbitrary commands. The bundle does not provide product-version detail, CVSS, or confirmed exploitation evidence. Exposure is most likely where Cisco collaboration, endpoint, network, security, management, routing, voice, video, wireless, or hosted-service products include the affected serialized-object interfaces. The bundle does not identify exact products, versions, ports, or deployment prerequisites. Treat as a high-priority inventory and patch-management issue for Cisco environments, especially internet-facing or management-plane systems. Urgency is driven by potential remote command execution, but prioritization should be refined after confirming exact affected products and exposure. Mitigation focus: Review Cisco advisory cisco-sa-20151209-java-deserialization for affected products and fixed releases.; Apply vendor-provided updates for confirmed affected Cisco products.; Reduce external exposure of administrative or application interfaces until status is confirmed..

Prepared

Jun 13, 2026, 21:26 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.