Microsoft Office Web Components is prone to a remote code-execution vulnerability that affects the OWC10.Spreadsheet ActiveX control. The control is identified by the following CLSIDs: 0002E541-0000-0000-C000-000000000046 0002E559-0000-0000-C000-000000000046 An attacker could exploit this issue by enticing a victim to visit a maliciously crafted site. Successfully exploiting this issue would allow the attacker to execute arbitrary code in the context of the currently logged-in user.
Run all software as a nonprivileged user with minimal access rights.
To mitigate the impact of a successful exploit, run the affected application as a user with minimal access rights.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities in applications. Review all applicable logs regularly.
Do not follow links provided by unknown or untrusted sources.
Never accept files or follow links from untrusted or unknown sources, because they may be malicious in nature.
The vendor has released an advisory and fixes. Please see the references for details.