DaystoPatch

N-ableExploited incident

N-able N-central pre-authentication remote code execution (static code injection)

CVE-2026-86218Critical, CVSS 10.0In CISA's Known Exploited Vulnerabilities catalog since 8 Sep 2026

  • Exploited before a fix
FixedFixed for every supported version on the day it became public.
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Response

Silence
same day
First public report to first vendor statement
Exposure
same day
First public report to first fix
Follow-through
same day
First public report to a fix for every supported version
  • Vendor silent
  • Vendor statement, no fix
  • Fixed for some versions
  • Fixed when disclosed
  • Date only, no time of day

Timeline and evidence

Open a moment to see its source and archived quote.

  1. First public report

    date only

    N-able Status: N-central 2026.3 Hotfix 4 - CVE-2026-86218CuratedQuote verified

    This hotfix includes security fixes for CVE-2026-86218 which is a critical-CVSS-rated vulnerability that could allow for pre-authenticated remote code execution on the N-central server

    Post shows 'Posted on September 6, 2026' (body also says 'Last Updated: Sept 5th 2026'). First public signal of the bug; N-able's simultaneous MSPGeek post and uptime incident page said it was exploited in the wild (see the Huntress candidate).

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    Curated. Found by a researcher, with a verbatim quote and link.
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    sha256:48398bda75fd97eb…
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    6 more sources for this moment
    Huntress blog: Rapid Response: Critical N-able N-central Vulnerability and Active Exploitation (update 9/6/26 @ 7:30 AM ET)CuratedQuote verified6 Sep 2026

    In the early morning hours (U.S. time) of 9/6/2026, Huntress was alerted to a new CVE

    The update heading reads 'Update: 9/6/26 @ 7:30 AM ET' (2026-09-06 11:30 UTC); recorded at day precision because the quoted sentence does not carry the time. Huntress quotes N-able's MSPGeek post: 'a new vulnerability that has been exploited in the wild'.

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    sha256:55dab30ef644a988…
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    CVE.org record CVE-2026-86218ClaimedQuote verified6 Sep 2026, 02:15 UTC

    N-central is vulnerable to a pre-auth remote code execution This issue affects N-central: before 2026.3.1.14.

    CVE record published.

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    sha256:8471975789bf0312…
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    N-able advisory https://status.n-able.com/?p=36086ClaimedQuote verified6 Sep 2026, 03:47 UTC

    N-central 2026.3 Hotfix 4 – CVE-2026-86218

    The vendor's own disclosure.

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    Bluesky postClaimedQuote not checked yet6 Sep 2026, 04:00 UTC

    CVE-2026-86218 - n-central

    Earliest third-party post we hold.

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    Mastodon postClaimedQuote not checked yet7 Sep 2026, 09:31 UTC

    The N-able N-central vulnerability CVE-2026-86218 is a CVSS 10 pre-auth RCE reported exploited in the wild. Apply 2026.3 HF4 immediately. # Nable # Ncentral # CVE202686218 # PreAuthRCE # RMM # ZeroDay # Huntress

    Earliest third-party post we hold.

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    CISA KEV (CVE-2026-86218)ClaimedQuote verified8 Sep 2026

    N-able N-central Static Code Injection Vulnerability

    Added to CISA's KEV catalog on 2026-09-08.

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  2. Vendor statement

    same day

    N-able advisory https://status.n-able.com/?p=36086ClaimedQuote verified

    N-central 2026.3 Hotfix 4 – CVE-2026-86218

    Recorded time
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    1 more source for this moment
    N-able Status: N-central 2026.3 Hotfix 4 - CVE-2026-86218CuratedQuote verified6 Sep 2026

    Posted on September 6, 2026 by annemayekar

    The post's permalink title attribute gives '3:47 am' with no time zone, so day precision. NVD shows the CVE record (CNA: N-able) published 2026-09-06T03:17:17 UTC.

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    Curated. Found by a researcher, with a verbatim quote and link.
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    sha256:48398bda75fd97eb…
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  3. First workaround

    No official mitigation found yet.

  4. First fix

    date onlysame day

    N-able Status: N-central 2026.3 Hotfix 4 - CVE-2026-86218 (Posted on September 6, 2026)CuratedQuote verified

    Customers running on-premises N-central deployments should upgrade to N-central 2026.3 HF4 immediately to protect their environment.

    Day taken from the post date ('Posted on September 6, 2026'), consistent with the N-able-assigned CVE record published 2026-09-06T03:17:17 UTC (per NVD) and Huntress being alerted 'In the early morning hours (U.S. time) of 9/6/2026'. News reports say HF4 was released 'on September 5' (US date); that is the same release seen in US time, so it is not recorded as a separate, earlier UTC day.

    Recorded time
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    Date only (no time of day is shown)
    Origin
    Curated. Found by a researcher, with a verbatim quote and link.
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    Found in the archived copy
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    sha256:48398bda75fd97eb…
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  5. Fixed for all versions

    date onlysame day

    N-able Status: N-central 2026.3 Hotfix 4 - CVE-2026-86218 (Posted on September 6, 2026)CuratedQuote verified

    If you are on an N-central hosted instance (NCOD), patches have already been applied to your environment.

    One fixed build (2026.3.1.14) for all supported on-premises versions (direct upgrade from 2025.4, 2026.1, 2026.2, 2026.3, HF1, HF2); hosted NCOD patched by N-able.

    Recorded time
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    Date only (no time of day is shown)
    Origin
    Curated. Found by a researcher, with a verbatim quote and link.
    Quote check
    Found in the archived copy
    Snapshot
    sha256:48398bda75fd97eb…
    Used in metrics
    Yes
    Dispute this timestamp

Send this to your boss

N-able N-central pre-auth code execution flaw exploited; fixed in 2026.3 HF4

N-able released an emergency hotfix for a maximum-severity flaw in its N-central remote management server that lets an attacker run code without logging in; N-able told customers it was being exploited.

In plain words

N-central is the tool many IT service providers use to manage and remotely control all of their customers' computers, so a break-in there can spread to every managed machine. In September 2026 N-able fixed a maximum-severity flaw that let attackers take over the server without a password, and told customers it had seen it exploited. If we or our IT provider run N-central ourselves, it must be on build 2026.3.1.14 or later, and the user list should be checked for unknown accounts. The cloud-hosted version was patched by N-able.

What happened and who is affected

What happened

On 5-6 September 2026 N-able released N-central 2026.3 Hotfix 4 (build 2026.3.1.14) to fix CVE-2026-86218, a static code injection flaw that allows pre-authentication remote code execution on the N-central server, rated 10.0. N-able's public release notes said it had no confirmation of exploitation, while its notice to customers and incident page said the flaw had been observed being exploited in the wild. CISA added it to the Known Exploited Vulnerabilities catalog on 8 September. It followed two other N-central hotfix rounds in August and early September 2026.

Who is affected

Self-hosted (on-premises) N-central servers on any build earlier than 2026.3.1.14 (2026.3 HF4), including 2026.3 HF3. Hosted N-central (NCOD) instances were patched by N-able.

CVE-2026-86218. Reviewed 22 Oct 2026. https://daystopatch.com/incidents/n-able-cve-2026-86218/

Affected products

  • N-able N-central (on-premises)
  • N-able N-central hosted (NCOD)
How we built this timeline

Conflicting vendor statements on exploitation: N-able's public HF4 notice says 'At this time, we have no confirmations that this vulnerability has been exploited in production environments', while its MSPGeek post and uptime incident page (https://uptime.n-able.com/event/201814/, quoted by Huntress) and an urgent customer notice (quoted by Help Net Security and The Hacker News) say it was exploited in the wild and call it a zero-day. We set exploited before a fix=true on the strength of the vendor's own exploitation statements at fix time.

CORRECTION PASS 23 Oct 2026: the earlier First fix/Fixed for all versions candidates of 5 Sep 2026 (Help Net Security, The Hacker News) were US-local dates for the same release and put the patch a day before the first public notice; all moments now use the UTC-consistent 6 Sep 2026 (status post date; CVE record 6 Sep 2026; the post body says 'Last Updated: Sept 5th 2026', i.e.

US time). Context: Huntress investigated a compromise of a fully patched N-central production environment from 4 Sep 2026 and could not say which CVE was used (CVE-2026-86206/86207 fixed in HF3, or this one).

Separate incidents: n-able-cve-2026-18577 (August hotfixes). The me.n-able.com advisory page requires JavaScript and its Wayback snapshot only renders a loading error, so it is not cited.

CVSS 10.0 is N-able's CNA CVSS 4.0 score (NVD: 9.8 v3.1).

Related

N-able report card