CVE-2026-18556 (GCVE-0-2026-18556)

Vulnerability from cvelistv5 – Published: 2026-08-01 19:59 – Updated: 2026-08-03 16:49
VLAI KEVIntel
Title
Unauthenticated administrative account takeover
Summary
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.
Severity
8.2 (High)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-288 - Authentication bypass using an alternate path or channel
Assigner
References
Impacted products
Vendor Product Version
N-able N-central Affected: 0 , ≤ 2026.1 (custom)
Create a notification for this product.
Date Public
2026-08-01 19:56
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c7348c25-7f52-4a7b-aceb-f7f22bc17056

Vulnerability ID: CVE-2026-18556

Status: Confirmed

Status Updated: 2026-08-01 13:51 UTC

Exploited: Yes

Timestamps
First Seen: 2026-08-01
Asserted: 2026-08-01
Scope
Notes: Unauthenticated administrative account takeover | Affected: N-able / N-central | CVSS: 8.2 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Unauthenticated administrative account takeover
Vendor N-able
Product N-central
Added Date 2026-08-01T13:51:00.000Z
Cvss Score 8.2
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-08-02 14:00 UTC | Updated: 2026-08-02 14:00 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.