Apple OS: Cryptographic Integrity Check Vulnerability Enabling Traffic Tampering
CVE-2026-84533 Published on September 14, 2026
A cryptographic issue was addressed with improved integrity checks. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, watchOS 27. An attacker in a privileged network position may be able to modify network traffic.
Vulnerability Analysis
Weakness Type
Missing Support for Integrity Check
The software uses a transmission protocol that does not include a mechanism for verifying the integrity of the data during transmission, such as a checksum. If integrity check values or "checksums" are omitted from a protocol, there is no way of determining if data has been corrupted in transmission. The lack of checksum functionality in a protocol removes the first application-level check of data that can be used. The end-to-end philosophy of checks states that integrity checks should be performed at the lowest level that they can be completely implemented. Excluding further sanity checks and input validation performed by applications, the protocol's checksum is the most important level of checksum, since it can be performed more completely than at any previous level and takes into account entire messages, as opposed to single packets.
Products Associated with CVE-2026-84533
Want to know whenever a new CVE is published for Apple products? stack.watch will email you.
Affected Versions
Apple iOS and iPadOS:- Before 27 is affected.
- Before 27 is affected.
- Before 27 is affected.
- Before 27 is affected.