CVE-2024-30040 Microsoft Windows: 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 Jun 4, 2024
What to do
- Install Microsoft's security update for Windows. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Let the browser auto-update and relaunch it when it asks — the fix is not active until you do.
- Keep extensions to a minimum and remove ones you do not recognise.
- Stop using Internet Explorer and any browser that no longer gets updates.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: A malicious or hacked website can be enough. Browser bugs are often the first step in a longer attack on the whole computer or phone.
The details
- Official name
- Microsoft Windows MSHTML Platform Security Feature Bypass Vulnerability
- Product
- Microsoft Windows
- CISA description
- Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for a security feature bypass.
- Type of flaw
- Login or permission bypass (CWE-20)
- Confirmed exploited
- May 14, 2024
- US federal patch deadline
- Jun 4, 2024
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Answering about CVE-2024-30040 ·
Questions about CVE-2024-30040
Is CVE-2024-30040 being exploited?
Yes. CISA added CVE-2024-30040 to its Known Exploited Vulnerabilities catalog on May 14, 2024, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2024-30040?
Install Microsoft's security update for Windows. If no update exists, follow the vendor's workaround or stop using the product until one ships. Let the browser auto-update and relaunch it when it asks — the fix is not active until you do.
Am I affected by CVE-2024-30040?
Only if you use Microsoft Windows. This one is aimed at devices or apps of the kind people own.