---
title: "CVE-2026-18556: Unauthenticated administrative account… | CubePath"
description: "Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass. This issue affects N-central…"
language: en
source: https://cubepath.com/security/cve/CVE-2026-18556
---

# CVE-2026-18556: Unauthenticated administrative account… | CubePath

## Description

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.

Official description from the CVE record, published by N-able. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-18556)

## Key data

### CVSS 4.0 High 8.2

Score published by N-able in the CVE record.

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

| Metric                              | Value   | What it means                                                                                                  |
| ----------------------------------- | ------- | -------------------------------------------------------------------------------------------------------------- |
| Attack vector                       | Network | The vulnerable component can be reached over a network, possibly from the Internet.                            |
| Attack complexity                   | High    | The attacker has to evade or get around security controls that are in place, which takes target-specific work. |
| Attack requirements                 | None    | The attack works without any special deployment or execution conditions.                                       |
| Privileges required                 | None    | No account or privileges are needed.                                                                           |
| User interaction                    | None    | No action from any user is needed.                                                                             |
| Vulnerable system: confidentiality  | High    | Serious or total effect on the secrecy of data.                                                                |
| Vulnerable system: integrity        | None    | No effect on the trustworthiness of data.                                                                      |
| Vulnerable system: availability     | None    | No effect on availability.                                                                                     |
| Subsequent systems: confidentiality | None    | No effect on other systems' data secrecy.                                                                      |
| Subsequent systems: integrity       | None    | No effect on other systems' data trustworthiness.                                                              |
| Subsequent systems: availability    | None    | No effect on other systems' availability.                                                                      |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.07882 (7.9% probability)

Percentile

94.8%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability

Added to the catalog

Aug 4, 2026

Federal due date

Aug 7, 2026

### CISA assessment as of Aug 4, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

yes

Technical impact

total

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-288](https://cwe.mitre.org/data/definitions/288.html) Authentication Bypass Using an Alternate Path or Channel

## Affected products

Products listed in the CVE record, as the CNA published them.

- N-able N-central

  - affected: up to 2026.1

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [uptime.n-able.com](https://uptime.n-able.com/)

## Timeline

1. ID reserved Aug 1, 2026
2. Record published Aug 1, 2026
3. Added to CISA KEV Aug 4, 2026
4. Record last updated Aug 5, 2026

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:10 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)