Quick answers
- Is CVE-2026-121904 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-121904 being exploited in the wild.
- How severe is CVE-2026-121904?
- Critical severity, with a CVSS score of 9.6, published 10 November 2026.
- Which products and versions are affected?
- Adobe Connect 12.12 and earlier.
- Is there a fix for CVE-2026-121904?
- Yes: fixed in 12.12.a, 12.11.i, 12.10.f, 12.9.a, 12.8.a. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-121904 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-121904?
- Check whether you run Adobe Connect at an affected version. 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.
How to fix
- Fixed in: 12.12.a, 12.11.i, 12.10.f, 12.9.a, 12.8.a
Technical details
A stored XSS vulnerability (CWE-79) in Adobe Connect allows a low-privileged attacker to inject malicious JavaScript into form fields that persists server-side. When other users browse to pages containing the vulnerable field, the JavaScript executes in their browsers with their privileges, enabling privilege escalation and session compromise. The vulnerability requires low-level user authentication but no victim interaction beyond normal use of the platform.
Affected products
- Adobe Connect 12.12 and earlier
Timeline
- 2026-11-10: disclosed