vault token disclosure via unvalidated postMessage vulnerability in N-able PassPortal allows Authentication Abuse.

This issue affects the PassPortal browser extension: before 3.49.6.

Orgs have already been ransomwared, patch immediately

Copied from r/msp

As our investigation into the recent N-central security vulnerability continues, we are proactively expanding protections in response to ongoing monitoring of threat actors as they evolve their attack techniques.

This is not a duplicate of our previous communication. Hotfix 2 is required, even if you already applied the earlier hotfix. Hotfix 2 supersedes Hotfix 1 with additional hardening measures to further protect you and your customers.

What You Need to Do:

N-central On-Premises Environments: You must upgrade to 2026.3.1.10 immediately. Download here: https://status.n-able.com/2026/08/06/n-central-2026-3-hotfix-2-additional-mitigation-for-cve-2026-18577

N-central Hosted Environments: No action is required. We have already applied mitigations to your environment.

For More Information:

· Blog: https://www.n-able.com/blog/n-central-security-update-august-6-2026

· Support: https://me.n-able.com/s/

· CVE: https://www.cve.org/CVERecord?id=CVE-2026-18577

· Uptime: https://uptime.n-able.com/

An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1

Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.

This issue affects N-central: through 2026.1.

The N-central Software Probe < 2025.4 is vulnerable to Remote Code Execution via deserialization

N-central < 2025.4 is vulnerable to authentication bypass via path traversal

N-central versions < 2025.4 are vulnerable to multiple XML External Entities injection leading to information disclosure

N-central < 2025.4 can generate sessionIDs for unauthenticated users

This issue affects N-central: before 2025.4.

An Incorrect File Handling Permission bug exists on the N-central Windows Agent and Probe that, in the right circumstances, can allow a local low-level user to run commands with elevated permissions.

On N-central, it is possible for any authenticated user to read, write and modify syslog configuration across customers on an N-central server. This vulnerability is present in all deployments of N-central prior to 2025.2.

Improper Input Validation vulnerability in N-able N-central allows OS Command Injection.This issue affects N-central: before 2025.3.1.

Deserialization of Untrusted Data vulnerability in N-able N-central allows Local Execution of Code.This issue affects N-central: before 2025.3.1.

N-central is vulnerable to a path traversal that allows unintended access to the Apache Tomcat WEB-INF directory. Customer data is not exposed.

This vulnerability is present in all deployments of N-central prior to N-central 2024.6.

Ecosystem Agent version 4 < 4.1.5.2597 and Ecosystem Agent version 5 < 5.1.4.2473 did not properly validate SSL/TLS certificates, which could allow a malicious actor to perform a Man-in-the-Middle and intercept traffic between the agent and N-able servers from a privileged network position.

The N-central server is vulnerable to an authentication bypass of the user interface. This vulnerability is present in all deployments of N-central prior to 2024.2.

This vulnerability was discovered through internal N-central source code review and N-able has not observed any exploitation in the wild.

The N-central server is vulnerable to session rebinding of already authenticated users when using Entra SSO, which can lead to authentication bypass. This vulnerability is present in all Entra-supported deployments of N-central prior to 2024.3.

The affected AutomationManager.AgentService.exe application contains a TOCTOU race condition vulnerability that allows standard users to create a pseudo-symlink at C:\ProgramData\N-Able Technologies\AutomationManager\Temp, which could be leveraged by an attacker to manipulate the process into performing arbitrary file deletions. We recommend upgrading to version 2.91.0.0

An issue discovered in N-able N-central before 2023.6 and earlier allows attackers to gain escalated privileges via API calls.

The N-able PassPortal extension before 3.29.2 for Chrome inserts sensitive information into a log file.

BASupSrvcUpdater.exe in N-able Take Control Agent through 7.0.41.1141 before 7.0.43 has a TOCTOU Race Condition via a pseudo-symlink at %PROGRAMDATA%\GetSupportServiceN-Central\PushUpdates, leading to arbitrary file deletion.

An issue found in N-able Technologies N-central Server before 2023.4 allows a local attacker to execute arbitrary code via the monitoring function of the server.