CVE-2026-18556

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.079 · 95 %ileexploit · PoCDEEUNLUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 1 exploit · PoC

Likely / severe?

7.88% (95th) EPSS

CVSS 7.4 · high

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · ncsc_nl

added 2026-08-04remediate by 2026-08-07

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.

EPSS · scored 2026-10-23

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

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

Technical severity, 0–10. One row per scoring source.

8.2

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 5.2

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · NCSC-NL NL

v4.08.2highCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.08.2highCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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:Xsecondary

v4.08.2highCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-288USCWE-288US

exploits (1)

Public proof-of-concept and weaponised exploit code.

CreamyG31337/ncentral-compromise-ioc-triageRead-only N-able N-central CVE-2026-18556/CVE-2026-18577 post-exploitation IoC hunter for Windows endpointsPoC · poc_in_github

affected products (5)

Products and version ranges known to be affected.

N-able N-Central <2026.3.1.7all versionscert_bundDE
N-Able N-central< 2026.3.1.7cert_bundDE
N-Able N-central≤ 0 ≤2026.1enisa_euvdEU
N-Able N-central≤ vers:unknown/*ncsc_nlNL
n-able n-central≤ 2026.1nvdUScpe:2.3:a:n-able:n-central:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2026-0275Kwetsbaarheden verholpen in N-able N-centralNL2026-08-03csaf · ncsc_nlNL
N-able heeft kwetsbaarheden verholpen in N-able N-central tot en met versie 2026.3.1.
WID-SEC-W-2026-2621N-able N-Central: Mehrere Schwachstellen ermöglichen Umgehen von SicherheitsvorkehrungenDeutsch2026-08-02csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in N-able N-Central ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund ncsc_nl nvd NVD CVE.org MITRE

published 2026-08-01modified 2026-10-23

references (5)

External citations — patches, advisories, analysis.

https://uptime.n-able.com/cnnvd
https://uptime.n-able.com/enisa_euvd
https://uptime.n-able.com/Vendor Advisorynvd
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18556US Government Resourcenvd
https://www.n-able.com/blog/n-central-security-update-august-2-2026Vendor Advisorynvd

scry

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