CVE-2026-18556: N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
N-able N-central contains an authentication bypass using an alternate path or channel that allows for authentication bypass.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-18556
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2026-18556Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 19% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-18556 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownexploitedN-able security advisory (AV26-769) - Update 1cccs
- highexploitedCISA Adds Three Known Exploited Vulnerabilities to Catalogcisa
- medium[NEU] [mittel] N-able N-Central: Mehrere Schwachstellen ermöglichen Umgehen von Sicherheitsvorkehrungencert-bund
- unknownexploitedNCSC-2026-0275 [1.00] [M/H] Kwetsbaarheden verholpen in N-able N-centralncsc-nl
- highexploitedCVE-2026-18556: Authentication bypass using an alternate path or channel vulnerability in N-able N-central all…nvd
Recent advisories for N-able N-central Authentication
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- criticalexploitedCVE-2026-18577: N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerabilitycisa-kev · 2026-08-03
- highexploitedCVE-2026-18556: Authentication bypass using an alternate path or channel vulnerability in N-able N-central all…nvd · 2026-08-01
More from CISA Known Exploited Vulnerabilities
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- criticalCVE-2026-18577: N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability2026-08-03
- criticalCVE-2026-20316: Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability2026-07-29
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