Update on ads - January 10th, 2014
Upon further investigation of the recent ad malware incident, we now know that users may have been impacted between December 27, 2013 - January 3, 2014. While the bulk of those exposed to the malicious advertisements were on European sites, a small fraction of users outside of this region may have been impacted as well.
This attack occurred because an account was compromised. The account has been shut down and we are actively working with law enforcement to investigate this.
If you think that you may have been impacted, you can take the following measures to ensure that your computer is protected:
- Ensure that your computer has the latest patches installed.
- Update to the latest versions of Java and Adobe software.
- Use an antivirus application and ensure that it is updated regularly.
At Yahoo, we take the safety and privacy of our users seriously. From December 31 to January 3 on our European sites, we served some advertisements that did not meet our editorial guidelines -- specifically, they spread malware. On January 3, we removed these advertisements from our European sites. Users in North America, Asia Pacific and Latin America were not served these advertisements and were not affected. Additionally, users using Macs and mobile devices were not affected.
We will continue to monitor and block any advertisements being used for this activity. We will post more information for our users shortly.