CVE-2023-21715 Microsoft Office: login or permission bypass
In plain words: A door that should be locked is not: part of the system can be reached without a valid login or permission. The attacker gets in as a user or administrator without knowing a password.
Confirmed exploited by CISA on · US federal patch deadline Mar 7, 2023
What to do
- Install Microsoft's security update for Office. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic updates for the operating system and for Office, PDF and archive apps.
- Be careful with unexpected attachments — documents, .zip/.rar files and shortcuts are common bait.
- Use a normal (non-admin) account day to day and keep built-in protection like Microsoft Defender on.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Your files, saved passwords and accounts. Many of these let a program that is already running gain full administrator control.
The details
- Official name
- Microsoft Office Publisher Security Feature Bypass Vulnerability
- Product
- Microsoft Office
- CISA description
- Microsoft Office Publisher contains a security feature bypass vulnerability that allows for a local, authenticated attack on a targeted system.
- Type of flaw
- Login or permission bypass (CWE-863)
- Confirmed exploited
- Feb 14, 2023
- US federal patch deadline
- Mar 7, 2023
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Answering about CVE-2023-21715 ·
Questions about CVE-2023-21715
Is CVE-2023-21715 being exploited?
Yes. CISA added CVE-2023-21715 to its Known Exploited Vulnerabilities catalog on Feb 14, 2023, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2023-21715?
Install Microsoft's security update for Office. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic updates for the operating system and for Office, PDF and archive apps.
Am I affected by CVE-2023-21715?
Only if you use Microsoft Office. This one is aimed at devices or apps of the kind people own.