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CVE-2026-18556

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

7.4 HIGHActively exploited (CISA KEV)EPSS 7.88%
  1. Published1 Aug 2026
  2. Added to CISA KEV4 Aug 2026
  3. Remediation due7 Aug 2026
Actively exploited (CISA KEV)

N-able N-central contains an authentication bypass using an alternate path or channel that allows for authentication bypass.

Added to KEV: 4 Aug 2026Federal remediation due: 7 Aug 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

N-able N-central≤ 2026.1

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-18556 being actively exploited?

Yes. CVE-2026-18556 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 4 Aug 2026.

How severe is CVE-2026-18556?

CVE-2026-18556 has a CVSS 3.1 base score of 7.4, rated high. EPSS estimates a 7.88% probability of exploitation.

Which products are affected by CVE-2026-18556?

Affected products include N-able N-central.

How do I fix CVE-2026-18556?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-18556 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.