CVE-2026-27303
Adobe Connect | Deserialization of Untrusted Data (CWE-502)
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. 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.
INFO
Published Date :
April 14, 2026, 6:16 p.m.
Last Modified :
April 28, 2026, 3:40 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-27303
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 078d4453-3bcd-4900-85e6-15281da43538 | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | MITRE-CVE | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Adobe Connect to a fixed version.
- Apply vendor-provided security patches.
- Restrict deserialization of untrusted data.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-27303.
| URL | Resource |
|---|---|
| https://helpx.adobe.com/security/products/connect/apsb26-37.html | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-27303 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-27303
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-27303 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-27303 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Apr. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Removed CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H -
CVE Modified by [email protected]
Apr. 28, 2026
Action Type Old Value New Value Changed 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. Exploitation of this issue does not require user interaction. Scope is changed. 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. 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. -
Initial Analysis by [email protected]
Apr. 22, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration AND OR *cpe:2.3:a:adobe:connect:*:*:*:*:*:-:*:* versions up to (excluding) 12.11 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:macos:*:* versions up to (including) 2025.3 *cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:windows:*:* versions up to (excluding) 2025.9.15 Added Reference Type Adobe Systems Incorporated: https://helpx.adobe.com/security/products/connect/apsb26-37.html Types: Vendor Advisory -
New CVE Received by [email protected]
Apr. 14, 2026
Action Type Old Value New Value Added 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. Exploitation of this issue does not require user interaction. Scope is changed. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Added CWE CWE-502 Added Reference https://helpx.adobe.com/security/products/connect/apsb26-37.html