Vulnerability report

Exploitation attempts observed Confirmed confidence Not in CISA KEV

CVE-2026-86206

N-central

N-able / N-central · affected before 2026.3.1.13

Watch CVE-2026-86206 Browse KEV feed
Severity
CVSS 6.9 · Medium
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
1.1%
First observed
09 Sep 2026
Last observed
26 Oct 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-86206 is an unauthenticated vulnerability affecting N-able N-central. A vulnerability in the N-central internal API access control filter allows unauthorised access to internal APIs. This is fixed in...

Have exploitation attempts been observed?

Yes. Previdian sensors have observed 137 exploitation attempts, 59 unique attacker IPs, and 23 countries targeting CVE-2026-86206. First observed Sep 09, 2026; last observed Oct 26, 2026. Confidence is confirmed.

Who is affected?

N-able / N-central affected before 2026.3.1.13.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

A vulnerability in the N-central internal API access control filter allows unauthorised access to internal APIs

A vulnerability in the N-central internal API access control filter allows unauthorised access to internal APIs. This is fixed in N-central 2026.3 HF3 and 2026.4

N-able Affected
N-central
Before 2026.3.1.13
View vendor advisory (opens in new tab)
Published
05 Sep 2026
Attempts Observed Since
09 Sep 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

nuclei_scanner

CVE References

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation attempts observed in the wild

Previdian

Recorded 09 Sep 2026

Previdian sensors observed exploitation attempts targeting this vulnerability.

Exploitation attempts observed

Previdian sensor

First observed 09 Sep 2026

Previdian sensors observed exploitation attempts targeting this vulnerability.

Proof of concept available

Nuclei Templates

Recorded 09 Sep 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
Previdian Sensors First 2026-09-10 06:32 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

Previdian Sensor Observations

Previdian sensor observations are exploitation attempts targeting this vulnerability. They do not show that the target was vulnerable or that the attempt succeeded. The cards and chart show volume, unique attackers, and daily activity.

137

Attempts observed

59

Unique attacker IPs

23

Attacker countries

AU · BG · CA · CH · CN · CY · CZ · DE · GB · HK · ID · IN · IT · JP · KR · NL · RO · RS · SG · TH · TW · US · YE

6

Sensors observed

CVE-2026-86206 exploitation attempts over the last 50 days

Daily events observed by Previdian sensors

Updated 27 Oct 2026

0
18
3
0
4
0
54
3
0
4
3
0
2
0
9
1
2
0
0
0
0
0
2
1
0
0
1
0
3
1
0
4
0
0
5
0
0
0
0
0
2
1
12
0
0
1
0
0
1
0
8 Sep 18 Sep 28 Sep 8 Oct 27 Oct

First observed 09 Sep 2026 · Last observed 26 Oct 2026

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
3
20
1

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-86206.yaml 09 Sep 2026

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

6.9 Medium

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS

1.1%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Incomplete Filtering of Special Elements CWE-791

Recent mention · Rapid7

CVE-2026-86206, CVE-2026-86207: N-able N-central Authentication Bypass (FIXED)

OverviewWhile conducting research into a recent N-able N-central authentication bypass vulnerability (CVE-2026-18577), Rapid7 Labs discovered two new vulnerabilities affecting the latest version of N-central. When chained together, these two vulnerabilities allow a remote...

Read full advisory

All Mentions

Recent mention · Rapid7

CVE-2026-86206, CVE-2026-86207: N-able N-central Authentication Bypass (FIXED)

Rapid7 · 08 Sep 2026

OverviewWhile conducting research into a recent N-able N-central authentication bypass vulnerability (CVE-2026-18577), Rapid7 Labs discovered two new vulnerabilities affecting the latest version of N-central. When chained together, these two vulnerabilities allow a remote unauthenticated attacker to bypass authentication and create a new attacker-controlled System administrator account on an affected server.CVE IDDescriptionCWECVSSv4CVE-2026-86206Semicolon/Forwarded access-control bypassCWE-7916.9 (Medium)CVE-2026-86207UserTwoFactorLogin authentication bypassCWE-3057.7 (High)Both...

Recent mention · N-able Uptime

URGENT: N-CENTRAL IMMEDIATE HOTFIX REQUIRED

N-able Uptime · 06 Sep 2026

**URGENT: N-CENTRAL IMMEDIATE HOTFIX REQUIRED** We recently communicated about two security vulnerabilities within N-central that were responsibly disclosed by a third party through our voluntary security disclosure program (https://uptime.n-able.com/event/201813/). To address these issues, we released a hotfix and strongly recommend that it be applied immediately to help ensure your environment remains protected. At the time of our initial communication, we had no confirmed evidence that either vulnerability had been exploited in production environments, though unpatched systems remained...

Recent mention · N-able Release Notes

N-central 2026.3 Hotfix 3 – CVE-2026-86206 and CVE-2026-86207

N-able Release Notes · 05 Sep 2026

Build Number: 2026.3.1.13    Last Updated: Sept 5th 2026  Security Update  This hotfix includes security fixes for CVE-2026-86206 and CVE-2026-86207 which are high-CVSS-rated vulnerabilities that could allow an unauthorized party to bypass authentication controls and gain full access to the N-central platform.   The vulnerabilities were responsibly … Continue reading →

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

N-able N-central - Access Control Bypass via Path Confusion and Forwarded Header Spoofing

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation attempts

  1. 04:31 UTC

    Public PoC available

    Public proof-of-concept code published

  2. 04:31 UTC

    Nuclei template available

    Scanner coverage available

  3. 01:19 UTC

    Indicators of compromise added (59)

    Indicators of compromise recorded

  4. 01:19 UTC

    Observed by Previdian sensors

    Previdian sensors observed exploitation attempts targeting this vulnerability.

  5. 19:17 UTC

    CVE published

    Vulnerability disclosed publicly

  6. 12:27 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-86206

Sample API response 
{
  "cve_id": "CVE-2026-86206",
  "confidence": "Confirmed",
  "cvss_score": 6.9,
  "cvss_estimated": false,
  "epss_score": 0.01118,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 137, "sensors": 6 }
}