CVE-2021-34087Network attack vector

Settings manipulation via clickjacked web interface

Published Jan 10, 2022 · Updated Aug 4, 2024

Clickjacking in Ultimaker S3 and S5 firmware through 6.3 and Ultimaker 3 through 5.2.16 lets remote attackers manipulate settings. The printers' local webserver allows its settings interface to be displayed inside an attacker-controlled page without an effective framing restriction. Exploitation requires a user to visit the crafted page and interact with disguised controls, causing unintended actions within the printer settings interface.

CVSS severity7.1
High
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Clickjacking in Ultimaker S3 and S5 firmware through 6.3 and Ultimaker 3 through 5.2.16 lets remote attackers manipulate settings. The printers' local webserver allows its settings interface to be displayed inside an attacker-controlled page without an effective framing restriction. Exploitation requires a user to visit the crafted page and interact with disguised controls, causing unintended actions within the printer settings interface.

The record

CVE
CVE-2021-34087
Published
Jan 10, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1021
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1021Improper Restriction of Rendered UI Layers or Frames

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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