CVE-2021-27007Network attack vector

Unauthenticated Remote Desktop session takeover

Published Dec 23, 2021 · Updated Aug 3, 2024

Authentication failure in NetApp VDS Local Control Plane before 6.1.21356.1837 allows remote attackers to take over Remote Desktop sessions. The flaw is exposed through the HTML5 gateway, but NetApp has not published the affected request, validation error, or session-binding mechanism. No credentials or user interaction are required, and successful exploitation grants control of an existing Remote Desktop session.

CVSS severity9.8
Critical
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication failure in NetApp VDS Local Control Plane before 6.1.21356.1837 allows remote attackers to take over Remote Desktop sessions. The flaw is exposed through the HTML5 gateway, but NetApp has not published the affected request, validation error, or session-binding mechanism. No credentials or user interaction are required, and successful exploitation grants control of an existing Remote Desktop session.

The record

CVE
CVE-2021-27007
Published
Dec 23, 2021
Updated
Aug 3, 2024
Vendor
NetApp
Product
NetApp Virtual Desktop Service
Classifications
T1563.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=NetApp Virtual Desktop Service (VDS) with Local Control Plane versions prior to 6.1.21356.1837

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NetApp · NetApp Virtual Desktop Serviceversion=NetApp Virtual Desktop Service (VDS) with Local Control Plane versions prior to 6.1.21356.1837

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1563.002Remote Service Session Hijacking: RDP Hijacking

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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