Incomplete patch leads to administrative account takeover
Published Aug 2, 2026 ·Due Aug 6, 2026
8.2
HIGHCVSS 4.0
EPSS 14.62%
Description
An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1
Affected products
-
- Version 0StatusaffectedConstraints<=2026.3
- Version 2026.3.1.7StatusunaffectedConstraints-
- Version
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:A
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
Date Added
Aug 3, 2026
Patch Due
Aug 6, 2026
Required Action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Aug 4, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (6 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 14.62% (0.14622) | 96.56th | v5 (v2026.06.15) |
| Aug 27, 2026 | 54.07% (0.54068) | 98.93th | v5 (v2026.06.15) |
| Aug 24, 2026 | 6.15% (0.06153) | 92.92th | v5 (v2026.06.15) |
| Aug 5, 2026 | 4.10% (0.04103) | 89.76th | v5 (v2026.06.15) |
| Aug 4, 2026 | 2.53% (0.02529) | 83.33th | v5 (v2026.06.15) |
| Aug 3, 2026 | 1.48% (0.01477) | 71.32th | v5 (v2026.06.15) |
References (5)
- https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_Release_Notes.htm PatchRelease Notes
- https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/ Release Notes
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18577 government-resourceUS Government Resource
- https://www.cve.org/CVERecord?id=CVE-2026-18556 VDB Entry
- https://www.n-able.com/blog/n-central-security-update-august-2-2026 vendor-advisoryVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central_2026.3_HF1_Release_Notes.htm | PatchRelease Notes | |
| https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigation-for-cve-2026-18577/ | Release Notes | |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18577 | government-resourceUS Government Resource | |
| https://www.cve.org/CVERecord?id=CVE-2026-18556 | VDB Entry | |
| https://www.n-able.com/blog/n-central-security-update-august-2-2026 | vendor-advisoryVendor Advisory |
Change history (0)
No recorded changes yet.