Adobe Connect <= 12.10 Multiple Vulnerabilities (APSB26-37)

critical Nessus Plugin ID 306393

Synopsis

The remote web server contains an application that is affected by multiple vulnerabilities.

Description

The version of Adobe Connect installed on the remote host is prior to 12.11. It is, therefore, affected by multiple vulnerabilities as referenced in the apsb26-37 advisory.

- 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. (CVE-2026-27303, CVE-2026-34615)

- Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser. Scope is changed.
(CVE-2026-21331, CVE-2026-27243, CVE-2026-27245, CVE-2026-34614)

- Adobe Connect versions 2025.3, 12.10 and earlier are affected by a DOM-based Cross-Site Scripting (XSS) vulnerability. An attacker could exploit this issue by manipulating the DOM environment to execute malicious JavaScript within the context of the victim's browser. Exploitation of this issue requires user interaction in that a victim must visit a crafted webpage. Scope is changed. (CVE-2026-27246)

- Adobe Connect versions 2025.3, 12.10 and earlier are affected by a Cross-Site Scripting (XSS) vulnerability that could result in privilege escalation. A low-privileged attacker could exploit this vulnerability to inject malicious scripts 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.
(CVE-2026-34617)

- Deserialization of Untrusted Data (CWE-502) potentially leading to Arbitrary code execution (CVE-2026-27302)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Adobe Connect version 12.11 or later.

Plugin Details

Severity: Critical

ID: 306393

File Name: adobe_connect_apsb26-37.nasl

Version: 1.2

Type: Remote

Agent: windows, macosx, unix

Family: CGI abuses

Published: 4/14/2026

Updated: 4/14/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-27303

CVSS v3

Risk Factor: Critical

Base Score: 9.6

Temporal Score: 8.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-34617

Vulnerability Information

CPE: cpe:/a:adobe:connect

Required KB Items: installed_sw/Adobe Connect

Exploit Ease: No known exploits are available

Patch Publication Date: 4/14/2026

Vulnerability Publication Date: 4/14/2026

Reference Information

CVE: CVE-2026-21331, CVE-2026-27243, CVE-2026-27245, CVE-2026-27246, CVE-2026-27302, CVE-2026-27303, CVE-2026-34614, CVE-2026-34615, CVE-2026-34617

CWE: 502, 79

Detections

Analytics