Quick answers
- Is CVE-2026-65400 exploited in the wild?
- Yes. CVE-2026-65400 is known to be exploited in the wild, first recorded on 18 August 2026. Treat it as urgent.
- How severe is CVE-2026-65400?
- Critical severity, with a CVSS score of 9.8, published 6 August 2026.
- Which products and versions are affected?
- Apple macOS.
- Is there a fix for CVE-2026-65400?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-65400 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-65400?
- Check whether you run Apple macOS. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This vulnerability is an authentication bypass in Apple macOS Screen Sharing, a remote desktop protocol service. The flaw allows an attacker positioned on the network to establish connections to affected Screen Sharing services without providing or validating credentials. An attacker with network access to an affected macOS system running Screen Sharing can gain unauthorized remote access, potentially enabling data theft, system compromise, or lateral movement within a network. The vulnerability has been exploited in the wild, indicating active threat actor interest. Patch availability and affected macOS versions were not detailed in the provided advisory excerpt.
Affected products
- Apple macOS
Timeline
- 2026-08-18: disclosed
- 2026-08-18: exploited