CVE-2021-30998 Information disclosure in iOS and iPadOS
An attacker can leak a sender's email address when sending S/MIME encrypted emails using certificates with multiple addresses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-30998?
CVE-2021-30998 is a medium-severity vulnerability in Apple Ipados, published on 24 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A S/MIME issue existed in the handling of encrypted email. This issue was addressed with improved selection of the encryption certificate. This issue is fixed in iOS 15.2 and iPadOS 15.2. A sender's email address may be leaked when sending an S/MIME encrypted email using a certificate with more than one email address.
Which versions are affected by CVE-2021-30998?
It affects 2 products.
Products include Apple Ipados, Apple Iphone Os.
How do I fix CVE-2021-30998?
No fix has been published for CVE-2021-30998 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-30998 being exploited?
There is no known exploitation of CVE-2021-30998 in the wild and no public exploit code.
Other vulnerabilities in Apple Ipados
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- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write