External risk intelligence

Adobe Connect Arbitrary Code Execution Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-75686

Adobe Connect is a web-conferencing and collaboration platform designed to be accessible via the public internet for remote meetings, webinars, and training sessions, making its web interface a commonly exposed surface.

Adobe Connect

before 12.12before 4.5

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

Adobe Connect, a web-conferencing platform, has a critical vulnerability that could allow attackers to execute arbitrary code on a user's system if the user interacts with a malicious link or webpage. This issue impacts the integrity and confidentiality of data by changing the scope of the vulnerability.

Input validation flaw allows code execution.
Critical flaw could impact user systems remotely.
Confirm relevance to understand potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker can target Adobe Connect users by sending them a malicious link or directing them to a compromised webpage. If a user interacts with this malicious content, it could trigger a vulnerability in the application, allowing the attacker to execute arbitrary code on the user's system.

No authentication required.
User visits malicious link.
Arbitrary code execution.

Live Threat

Current exploitation, exposure, and threat context

An Improper Input Validation vulnerability in Adobe Connect could allow an attacker to execute arbitrary code on a user's system when the user visits a malicious URL or interacts with a compromised web page. This vulnerability could affect system data and service behavior in the context of the current user.

System data and user session.
Via maliciously crafted URLs or compromised web pages.
Arbitrary code execution in user context.

Operational Fix

Recommended remediation, mitigation, and detection steps

Adobe Connect's widespread use for web conferencing and collaboration, often exposed externally, means that platform or application owners and potentially network/security teams are likely responsible for addressing this vulnerability. The first practical step involves identifying all instances of Adobe Connect, confirming their reachability and business criticality, and then locating the accountable owner for remediation planning.

Platform/application owners should manage the issue.
Verify external reachability and critical assets first.
Plan remediation based on confirmed business risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Adobe Connect?

Adobe Connect is a web-conferencing and collaboration platform used for hosting remote meetings, webinars, and training sessions. It allows participants to share screens, documents, and interactive media in real-time, often accessed via web browsers or mobile applications.

What does Improper Input Validation mean for CVE-2026-75686?

This vulnerability, classified as CWE-20, occurs when software fails to properly check or sanitize incoming data. In this specific case, it allows an attacker to supply malicious input that the application mistakenly processes, potentially leading to unauthorized code execution on the user's system.

How is this Adobe Connect vulnerability triggered?

Exploitation requires a specific user action: the victim must click a maliciously crafted URL or navigate to a compromised webpage while the software is active. Simply having the software installed or running does not trigger the vulnerability without this external user interaction.

Why should I care about CVE-2026-75686?

According to Halo Surface Signal, Adobe Connect is frequently deployed as an internet-facing service to facilitate global collaboration. Because it is designed for public access, its web interfaces are a common surface for interaction, increasing the likelihood that users could be exposed to malicious content.

How do I respond to this vulnerability?

Begin by identifying all active instances of Adobe Connect within your organization. Confirm which deployments are reachable from the internet and prioritize those for review. Once identified, coordinate with the application owners to plan and implement the necessary updates provided by the vendor.

References

helpx.adobe.com/security/products/connect/apsb26-150.html

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.