XXE in Adobe Connect

CVE-2026-121887

Adobe Connect is affected by an Improper Restriction of XML External Entity Reference ('XXE') vulnerability that could result in arbitrary code execution in the context of the current user. A low-privileged attacker could exploit this vulnerability to execute arbitrary code. Exploitation of this issue does not require user interaction. Scope is changed.

Vulnerability class: XXE (XML External Entity)

Published .

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-121887?
CVE-2026-121887 is a critical-severity vulnerability in Adobe Connect, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.9/10. Published 2026-11-10.
How severe is CVE-2026-121887?
Critical severity. CVSS v3 base score is 9.9 out of 10.