CVE-2026-83964 is a medium severity (CVSS 6.2) improper certificate validation flaw in Adobe Connect that could disclose sensitive memory, with no user interaction. The record lists Adobe Connect and Connect for mobile on Windows and macOS. The fixed version is in Adobe bulletin APSB26-150.
What's affected
The record names Adobe Connect and Adobe Connect for mobile, with Microsoft Windows and Apple macOS listed as platforms. It says improper certificate validation could lead to disclosure of sensitive memory, that an attacker could use it to disclose sensitive information, and that exploitation does not need user interaction.
The CVSS vector in the record is local, low complexity, no privileges and no interaction, with a high confidentiality impact only. The official source is Adobe bulletin APSB26-150. Adobe's site refused my request with an access denied response, so I could not read the affected and fixed build numbers. I will not state a version I could not confirm.
If you run the Connect desktop application or the mobile app, treat the bulletin as the single source of truth for which builds are fixed.
How to check if you're exposed
Check the version of the Adobe Connect application on each device. On the desktop app, open the About screen from the application menu. On managed Windows fleets, you can read the installed version from software inventory or PowerShell:
Get-Package -Name "*Adobe Connect*"
On macOS, open the app's About window or look in the Applications folder with Get Info. For the mobile app, check the app store listing and the version in the app's settings. Compare the numbers with the fixed builds in APSB26-150.
Adobe Connect also has a hosted service side. If you use the cloud service, check whether Adobe's bulletin lists any action for hosted customers.
What to do now
- Open Adobe bulletin APSB26-150 and note the fixed builds for each platform.
- Update the Connect desktop app on Windows and macOS, and the mobile app, to the fixed builds.
- Use your software inventory to find laptops that never updated, and push the update through your usual tooling.
- Make sure users get app updates from official channels, not from links in messages.
- Add Adobe Connect to the list of applications your vulnerability scanning covers, so the next bulletin is matched against installed versions.
Why it matters
Improper certificate validation, tracked as CWE-295, is a trust failure. The software is meant to check that the party it talks to holds a valid certificate for the right name. If it does not check properly, it can be talked into trusting the wrong party. The record links this to the disclosure of sensitive memory, so the effect is an information leak, not code execution.
The local vector and the confidentiality only impact explain the medium rating. Conferencing applications handle audio, screens and shared files, so a leak from memory is worth fixing even at this score. The record does not list this CVE as exploited in the wild.
Quick check
Is this a remote code execution issue?
No. The record describes disclosure of sensitive memory, with impact on confidentiality only.
Which build fixes it?
Adobe's bulletin APSB26-150 has the answer. I could not read it, so check it directly.
Sources
Last reviewed: 18 October 2026.
