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Luu, T.J.

🔥 This vulnerability is being actively exploited in the wild (CISA Known Exploited Vulnerabilities catalog)

CVE-2026-18577: N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability

infovulnerability🔥 Actively Exploited

security

Source: CISA Known Exploited VulnerabilitiesAugust 2, 2026CVE-2026-18577

Summary

N-able N-central has a security flaw that allows attackers to bypass authentication (the process of verifying a user's identity) and take over accounts by using an alternate path or channel to access the system. This vulnerability exists because an earlier patch for a related issue, CVE-2026-18556, was incomplete. The flaw is currently being exploited by attackers in real-world attacks.

Solution / Mitigation

Apply mitigations according to N-able's vendor instructions while following CISA's BOD 26-04 guidance on prioritizing security updates. For cloud services, follow BOD 26-04 guidance or stop using the product if mitigations are unavailable. The specific fix is N-central version 2026.3 HF1 (hotfix 1), which addresses this vulnerability.

Vulnerability Details

EPSS (30-day exploit probability)

EPSS: 1.5%

Patch Available

Yes

Exploit Maturity

🔥 Actively Exploited

Disclosure Date

August 2, 2026

Classification

Attack SophisticationModerate

Taxonomy References

CWE (Weakness Type)

CWE-288

Monthly digest — independent AI security research

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-18577

First tracked: August 3, 2026 at 08:01 PM

Classified by LLM (prompt v3) · confidence: 95%