CVE-2026-34615
Published: 14 April 2026
Summary
CVE-2026-34615 is a critical-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Adobe Connect Desktop Application. Its CVSS base score is 9.3 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 10.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Applying vendor patches for CVE-2026-34615 directly remediates the deserialization flaw in Adobe Connect, preventing arbitrary code execution from untrusted data.
Validating untrusted information inputs prior to deserialization blocks malicious payloads delivered via crafted URLs exploiting CVE-2026-34615.
Memory protection mechanisms mitigate arbitrary code execution resulting from successful deserialization exploitation in CVE-2026-34615.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE-2026-34615 is a deserialization vulnerability in Adobe Connect, a public-facing web application, enabling remote arbitrary code execution with no privileges required (AV:N/AC:L/PR:N), directly mapping to Exploit Public-Facing Application (T1190).
NVD Description
Adobe Connect versions 2025.3, 12.10 and earlier are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. An attacker could exploit this vulnerability to inject malicious scripts…
more
into a web page, potentially gaining elevated access or control over the victim's account or session. Exploitation of this issue requires user interaction in that a victim must visit a maliciously crafted URL or interact with a compromised web page. Scope is changed.
Deeper analysisAI
CVE-2026-34615 is a Deserialization of Untrusted Data vulnerability (CWE-502) affecting Adobe Connect versions 2025.3, 12.10, and earlier. This flaw allows arbitrary code execution in the context of the current user, with a CVSS v3.1 base score of 9.3 (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N), indicating high severity due to network accessibility, low attack complexity, no required privileges, user interaction, changed scope, and significant impacts on confidentiality and integrity.
An unauthenticated attacker can exploit this vulnerability by tricking a victim into visiting a maliciously crafted URL or interacting with a compromised web page. Successful exploitation enables the injection of malicious scripts into a web page, potentially granting the attacker elevated access or control over the victim's account or session.
Adobe has published security bulletin APSB26-37 at https://helpx.adobe.com/security/products/connect/apsb26-37.html, which provides details on mitigation, including available patches for affected versions.
Details
- CWE(s)