---
cve: "CVE-2026-18577"
severity: "HIGH"
cvss: 8.2
epss: "14.6%"
vendor: "N-Able"
kev: true
exploited: true
published: "2026-08-02 22:06:18"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-28T23:06:36+01:00"
---

# CVE-2026-18577

> 8.2 HIGH · ⚠️ CISA KEV (87 Tage) · 🔓 Exploited

## Beschreibung

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

## CNA-Record (Kanon, cvelistV5)

- CNA: **N-able**
- State: PUBLISHED
- Stand: 2026-08-04 13:32:51
- CNA-CVSS: **8.2** (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:A`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA KEV seit: **03.08.2026**
- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **active**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Schwachstellen-Klasse

- **CWE-288** — Authentication Bypass Using an Alternate Path or Channel
  The product requires authentication, but the product has an alternate path or channel that does not require authentication.

## Angriffsmuster (CAPEC)

- [CAPEC-127 — Directory Indexing](https://capec.mitre.org/data/definitions/127.html) _(Severity: Medium)_
- [CAPEC-665 — Exploitation of Thunderbolt Protection Flaws](https://capec.mitre.org/data/definitions/665.html) _(Severity: Very High)_

## ATT&CK-Techniken

- [T1083 — File and Directory Discovery](https://attack.mitre.org/techniques/T1083/)
- [T1211 — Exploitation for Defensive Evasion](https://attack.mitre.org/techniques/T1211/)
- [T1542.002 — Pre-OS Boot: Component Firmware](https://attack.mitre.org/techniques/T1542/002/)
- [T1556 — Modify Authentication Process](https://attack.mitre.org/techniques/T1556/)

## BSI-Hinweise (deutsch)

- [N-able N-Central: Mehrere Schwachstellen ermöglichen Umgehen von Sicherheitsvorkehrungen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-2621) — _BSI-Einstufung: mittel_
  Ein Angreifer kann mehrere Schwachstellen in N-able N-Central ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

## Referenzen

- <https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_Release_Notes.htm>
- <https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/>
- <https://www.cve.org/CVERecord?id=CVE-2026-18556>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-18577/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_