2026年8月22日の
セキュリティ情報

Subject: [Security Alert] Beware of Phishing and Social Engineering Attacks

Dear employees,

We are seeing an increase in sophisticated social engineering attacks targeting the financial sector, where attackers attempt to gain unauthorized access to corporate systems.

What we need from you:
1. Be extremely cautious with emails or messages from unknown senders, especially those creating a sense of urgency. Do not click suspicious links or download unknown attachments.
2. Avoid reusing passwords across different accounts and ensure Multi-Factor Authentication (MFA) is enabled wherever possible.
3. Report any suspicious emails or communications to the IT security team immediately.

Deadline: Immediate action requested.

Subject: [Security Alert] Potential Data Breach at Chess.com

Dear employees,

We have been informed of a potential large-scale data breach affecting users of the online chess platform "Chess.com."

Requested Actions:
1. If you have a Chess.com account, please change your password immediately.
2. If you reuse the same password for other services, we strongly recommend changing those passwords as well.
3. Be vigilant against suspicious emails (e.g., fake password reset requests or notifications) and do not click any links.

Deadline: As soon as possible

Subject: [Security Alert] Proper Disposal of Old Credit Cards

Hi everyone,

It has been reported that expired contactless credit cards can potentially be reused for payments due to a technical vulnerability.

Requested Actions:
1. When disposing of old credit cards, please ensure the IC chip is physically destroyed (e.g., cut into small pieces with scissors) rather than relying solely on a shredder.
2. Verify with your card issuer that old cards have been properly deactivated.

Deadline: Immediate