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CVE-2026-18556· NVD / CVE Program· CNA N-able

Unauthenticated administrative account takeover

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.

HighCVSS 8.2 · v4.0KEVWeaponized No fix recorded
Published
Aug 1, 2026
Updated
Aug 5, 2026
EPSS
7.9% · 95th percentile▼ 32
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Report tools

JSON

Action score

64

This week

Don’t wait for the next maintenance window.

CVSS
32 / 40 · 8.2 / 10
CISA KEV
30 / 30 · Listed
EPSS
2 / 30 · 7.9%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · N-able
8.2
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Aug 4, 2026. That signals real attacks, not theory.

Remediation deadline for government agencies: Aug 7, 2026.

Affected systems

VendorProduct
n-ablen-central

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • n-able n-centralup to 2026.1 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (N-able). Independent of NVD's CPE analysis and usually ahead of it.

  • N-able N-central

    • up to and including 2026.1affected

Same product

n-able: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-86218pre-authentication remote code executionKEV
    74This week
  • CVE-2025-8876Command Injection VulnerabilityKEV
    68This week
  • CVE-2025-8875Insecure Deserialization VulnerabilityKEV
    68This week
  • CVE-2026-18577Incomplete patch leads to administrative account takeoverKEV
    66This week
  • CVE-2025-11700N-central Multiple XXE Injection Vulnerabilities
    42Plan
  • CVE-2025-11367N-central windows software probe Remote Code Execution
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Nuclei detection templateNuclei template CVE-2026-18577 —
Proof-of-concept repository on GitHubstars:02026-08-06

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. CISA KEV+2 d
  3. First PoC+4 d
  4. TodaySep 29, 2026+59 d
EPSS, last 120 days-32% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-185771 days apartIncomplete patch leads to administrative account takeoverKEV
    66This week

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-288 · Authentication Bypass Using an Alternate Path or Channel

CVSS vector

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/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:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records