Vulnerabilities

CVE-2026-86218 is a static code injection flaw (CWE-96) in N-able's N-central on-premises remote monitoring and management (RMM) platform, carrying a maximum CVSS 4.0 score of 10.0. An unauthenticated, remote attacker triggers it by sending crafted network input to the N-central server that is improperly neutralized and persisted into application-managed code, which the server then executes — no privileges (PR:N) or user interaction (UI:N) are required. Successful exploitation yields full server compromise with high impact on confidentiality, integrity, and availability, and because N-central acts as the management hub for downstream customer endpoints, compromise can expose the entire managed estate. Any organization running an affected N-central release (before 2026.3.1.14) — primarily MSPs and corporate IT departments using N-able RMM — is affected. The flaw is confirmed exploited in the wild: N-able patched it as a zero-day, CISA added it to the KEV catalog on 2026-09-08, and it is the fourth N-central hotfix in five weeks, though no public PoC is known and ransomware use is unknown.

Do: Upgrade N-central to 2026.3.1.14 or later (or apply N-able's hotfix) immediately, as the flaw is in CISA's KEV catalog and BOD 26-04 timelines apply to federal stakeholders. Until patched, remove direct internet exposure of the N-central server (restrict to VPN/management networks via firewall allowlists) since no authentication is needed for exploitation. Because in-the-wild exploitation is confirmed, review internet-facing N-central servers for indicators of compromise such as unexpected processes, unusual child processes of the web service, and new or suspicious accounts.

CVE-2026-18577 is an authentication bypass (CWE-288) in N-able's N-central RMM platform caused by an incomplete patch for the earlier vulnerability CVE-2026-18556. Because the original fix can be bypassed via an alternate path or channel, a remote, unauthenticated attacker needs no privileges or user interaction, though the attack requires meeting exploit-specific conditions (high attack complexity, CVSS 4.0: 8.2 High). Successful exploitation lets the attacker bypass authentication and take over N-central accounts, gaining high-impact access to the management console with limited direct effects on downstream services. All N-central versions through 2026.3.1 are affected. Exploitation is confirmed in the wild: the flaw was added to CISA's KEV on 2026-08-03, EPSS estimates a 54.1% chance of exploitation within 30 days (99th percentile), and news reports say attackers kept exploiting it even as N-able shipped successive hotfixes; ransomware use is currently unknown.

Do: Upgrade N-central to a fixed release or hotfix newer than 2026.3.1 following N-able's advisory — the vendor has issued multiple successive hotfixes for this and related N-central flaws, so verify you are on the latest build. Because the flaw is on CISA's KEV, federal and BOD 26-04-bound organizations must apply vendor mitigations promptly or discontinue use of the product if patching is unavailable. Limit internet exposure of N-central portals and review accounts for signs of takeover or unauthorized access.

N-able's N-central RMM platform contains an authentication bypass (CWE-288) in which an alternate path or channel allows requests to skip the normal authentication check. An unauthenticated attacker can trigger it by sending requests through that alternate path without valid credentials, gaining unauthorized access to the N-central management interface; because N-central is remote monitoring and management software run by managed service providers, such access can expose management functions across downstream customer environments. N-able N-central deployments are affected; the available data does not specify affected version ranges or fixed builds. The flaw was added to CISA's Known Exploited Vulnerabilities catalog on 2026-08-04, confirming exploitation in the wild, with a high EPSS of 40.2% (99th percentile), no CVSS score yet, no public PoC, and undetermined ransomware use; related reporting describes a recent string of N-central hotfixes, including fixes for unauthenticated remote code execution.

Do: Apply N-able's hotfix for N-central immediately per the vendor's instructions, since the flaw is in CISA KEV and BOD 26-04 applies (for cloud-hosted N-central, apply mitigations per BOD 26-04 or discontinue use if mitigations are unavailable). Until patched, restrict internet exposure of the N-central server to trusted management networks and review authentication logs for unexpected access, following CISA's forensics triage guidance. Check the vendor advisory for the exact fixed build, as the available data does not list affected or fixed version numbers.

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

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.

N-able N-central, an RMM platform widely used by managed service providers, contains an OS command injection flaw (CWE-78) caused by improper input validation (CWE-20), allowing an attacker to execute arbitrary operating-system commands on the N-central server. The flaw is reachable over the network (AV:N) and requires only low-privileged access with no user interaction, per the CVSS 4.0 vector. Successful exploitation yields high impact on confidentiality, integrity, and availability, and the 'subsequent system' impacts indicate compromise can extend beyond the N-central server itself, putting all endpoints that the affected MSP manages at risk. All N-central deployments running versions before 2025.3.1 are affected. The flaw is being exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2025-08-13 following reported customer compromises, though no public proof-of-concept is known and ransomware use is unknown.

Do: Upgrade N-central to version 2025.3.1 or later immediately, as the flaw is under active exploitation and CISA KEV requires federal agencies to apply vendor mitigations per BOD 22-01 or discontinue use. MSPs should check their N-central servers for signs of compromise, review accounts for anomalous or low-privileged sessions, and assume downstream managed endpoints may be at risk given the subsequent-system impact. Note that this is one of two recently patched N-central flaws being exploited in the wild, so ensure all recent hotfixes (multiple releases in recent weeks) are applied.

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.

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 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%\GetSupportService_N-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.