CVE-2026-18556 N-able N-central Authentication Bypass Using an Alternate Path or Channel
Unauthenticated attackers can bypass authentication to take over administrative accounts in N-able N-central.
- Exploited in the wild
- Since 4 Aug 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18556?
CVE-2026-18556 is a high-severity authentication bypass vulnerability in N-able N-central, published on 1 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-288
Which versions are affected by CVE-2026-18556?
It affects 1 product.
Products include N-Able N-Central.
How do I fix CVE-2026-18556?
No fix has been published for CVE-2026-18556 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 7 Aug 2026.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-18556 being exploited?
Yes. Attackers have exploited CVE-2026-18556 in the wild since at least 4 Aug 2026.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in N-able N-central
- CVE-2026-86218 N-able N-central Static Code Injection
- CVE-2025-8875 N-able N-Central Insecure Deserialization
- CVE-2025-8876 N-able N-Central Command Injection
- CVE-2026-18577 N-able N-central Authentication Bypass Using an Alternate Path or Channel
- CVE-2025-11367 N-central windows software probe Remote Code Execution
Sources
Also known as GHSA-fffv-7w63-p3xw.