CVE-2026-34659

Description

Adobe Connect versions 2025.9.15, 2025.8.157 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 execute arbitrary code. 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.

CVSS v3.1 Score

9.6

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0374

Probability of exploitation

0.88%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-502 Deserialization of Untrusted Data

Affected Products

Vendor	Product	Versions
adobe	connect_desktop_application	< 2025.8.157
adobe	connect_desktop_application	All

References

Advisories & Patches

https://helpx.adobe.com/security/products/connect/apsb26-50.html

Frequently Asked Questions

What is CVE-2026-34659? +

Adobe Connect versions 2025.9.15, 2025.8.157 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 execute arbitrary code. 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. It has a CVSS v3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2026-34659? +

CVE-2026-34659 has a CVSS v3.1 score of 9.6 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0374, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-34659? +

CVE-2026-34659 affects products from adobe, specifically: connect_desktop_application. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-34659? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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