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NVD / CVE Program· CNA CERTVDE

CVE-2021-33543: UDP Technology/Geutebrück camera devices: Authentication Bypass

Noroxi assessment

Priority: This week (action score 63/100)

  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 81.3% (FIRST EPSS); higher than 99.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Multiple camera devices by UDP Technology, Geutebrück and other vendors allow unauthenticated remote access to sensitive files due to default user authentication settings. This can lead to manipulation of the device and denial of service.

CriticalCVSS 9.8 · v3.1—Weaponized No fix recorded
Published
Sep 13, 2021
Updated
Jun 16, 2026
EPSS
81.3% · 99th percentile

Report tools

JSON

Action score

63

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
24 / 30 · 81.3%

CNA vs NVD score

NVD
9.8
CNA · CERTVDE
9.8
agree

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

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-33543

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
geutebrueckg-cam ebc-2110 firmware
geutebrueckg-cam ebc-2110
geutebrueckg-cam ebc-2111 firmware
geutebrueckg-cam ebc-2111
geutebrueckg-cam efd-2241 firmware
geutebrueckg-cam efd-2241
geutebrueckg-cam efd-2250 firmware
geutebrueckg-cam efd-2250
geutebrueckg-cam ethc-2230 firmware
geutebrueckg-cam ethc-2230
geutebrueckg-cam ethc-2239 firmware
geutebrueckg-cam ethc-2239

and 20 more

Affected versions

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

  • geutebrueck g-cam ebc-2110 firmwareup to 1.12.0.27 inclusive
  • geutebrueck g-cam ebc-2110 firmware1.12.13.2
  • geutebrueck g-cam ebc-2110 firmware1.12.14.5
  • geutebrueck g-cam ebc-2111 firmwareup to 1.12.0.27 inclusive
  • geutebrueck g-cam ebc-2111 firmware1.12.13.2
  • geutebrueck g-cam ebc-2111 firmware1.12.14.5
  • geutebrueck g-cam ebc-2112 firmwareup to 1.12.0.27 inclusive
  • geutebrueck g-cam ebc-2112 firmware1.12.13.2
  • geutebrueck g-cam ebc-2112 firmware1.12.14.5
  • geutebrueck g-cam efd-2241 firmwareup to 1.12.0.27 inclusive
  • geutebrueck g-cam efd-2241 firmware1.12.13.2
  • geutebrueck g-cam efd-2241 firmware1.12.14.5
  • geutebrueck g-cam efd-2250 firmwareup to 1.12.0.27 inclusive
  • geutebrueck g-cam efd-2250 firmware1.12.13.2
  • geutebrueck g-cam efd-2250 firmware1.12.14.5
  • geutebrueck g-cam efd-2251 firmwareup to 1.12.0.27 inclusive
  • geutebrueck g-cam efd-2251 firmware1.12.13.2
  • geutebrueck g-cam efd-2251 firmware1.12.14.5
  • geutebrueck g-cam ethc-2230 firmwareup to 1.12.0.27 inclusive
  • geutebrueck g-cam ethc-2230 firmware1.12.13.2

Versions reported by the vendor

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

  • Geutebrück E2 Series

    • EBC-21xx 1.12.13.2, EBC-21xx 1.12.14.5, EFD-22xx 1.12.13.2, EFD-22xx 1.12.14.5, ETHC-22xx 1.12.13.2, ETHC-22xx 1.12.14.5, EWPC-22xx 1.12.13.2, EWPC-22xx 1.12.14.5affected
    • EBC-21xx and later · up to and including 1.12.0.27affected
    • EFD-22xx and later · up to and including 1.12.0.27affected
    • ETHC-22xx and later · up to and including 1.12.0.27affected
    • EWPC-22xx and later · up to and including 1.12.0.27affected

  • Geutebrück Encoder G-Code

    • EEC-2xx 1.12.13.2, EEC-2xx 1.12.14.5, EEN-20xx 1.12.13.2, EEN-20xx 1.12.14.5affected
    • EEC-2xx and later · up to and including 1.12.0.27affected
    • EEN-20xx and later · up to and including 1.12.0.27affected

Same product

geutebrueck: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-33544UDP Technology/Geutebrück camera devices: command injection leading to RCE
    57Plan
  • CVE-2021-33549UDP Technology/Geutebrück camera devices: Buffer overflow in action parameter leading to RCE
    48Plan
  • CVE-2021-33554UDP Technology/Geutebrück camera devices: Command injection in appfile.filename parameter leading to RCE
    46Plan

Published before and after this one in the same product

  • ← EarlierCVE-2020-16205Aug 14, 2020 · Using a specially crafted URL command, a remote authenticated user can execute commands as root on the G-Cam and G-Code (Firmware Versions…
    46Plan
  • Later →CVE-2021-33545Sep 13, 2021 · UDP Technology/Geutebrück camera devices: Buffer overflow in counter parameter leading to RCE
    29Monitor
  • Later →CVE-2021-33546Sep 13, 2021 · UDP Technology/Geutebrück camera devices: Buffer overflow in name parameter leading to RCE
    29Monitor

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

  • Metasploit module ×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
Metasploit moduleexploit/linux/http/geutebruck_cmdinject_cve_2021_335xxGeutebruck Multiple Remote Command Executionexploit2021-07-08

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. Metasploit-68 d
  2. Published
  3. TodayNov 11, 2026+1885 d

No history yet (it accumulates with the daily EPSS job).

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.

Variant candidates

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

—

Chain candidates

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

  • CVE-2021-335540 days apartUDP Technology/Geutebrück camera devices: Command injection in appfile.filename parameter leading to RCE
    46Plan
  • CVE-2021-335510 days apartUDP Technology/Geutebrück camera devices: Command injection in environment.lang parameter leading to RCE
    43Plan
  • CVE-2021-335530 days apartUDP Technology/Geutebrück camera devices: Command injection in command parameter leading to RCE
    43Plan
  • CVE-2021-335450 days apartUDP Technology/Geutebrück camera devices: Buffer overflow in counter parameter leading to RCE
    29Monitor

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.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-306 · Missing Authentication for Critical Function

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

A function added for development or support ships to production without authentication. It often relies on the assumption that it is “only reachable from the internal network.”

The bug in code

The whole CWE-306 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
// Added for the support teamapp.post("/maintenance/reset", resetDevice);

Fixed

ts
if (config.maintenanceEnabled) {  app.post(    "/maintenance/reset",    requireSession, requireRole("admin"), resetDevice  );}

Attack context

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

ATT&CK techniques

—

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