CVE-2021-33545Network attack vector

Remote code execution via counter stack overflow

Published Sep 13, 2021 · Updated Sep 17, 2024

A stack overflow in Geutebrück G-Cam/E2 and G-Code firmware allows remote authenticated users to execute arbitrary code via the counter parameter. The countreport.cgi handler accepts the counter value without enforcing its length, allowing adjacent stack data to be overwritten and control flow to be hijacked. Operator access is normally sufficient, and successful exploitation runs code as root; a separate path-normalization flaw can remove authentication.

CVSS severity7.2
High
EPSS probability2.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack overflow in Geutebrück G-Cam/E2 and G-Code firmware allows remote authenticated users to execute arbitrary code via the counter parameter. The countreport.cgi handler accepts the counter value without enforcing its length, allowing adjacent stack data to be overwritten and control flow to be hijacked. Operator access is normally sufficient, and successful exploitation runs code as root; a separate path-normalization flaw can remove authentication.

The record

CVE
CVE-2021-33545
Published
Sep 13, 2021
Updated
Sep 17, 2024
Vendor
Geutebrück
Product
G-Cam/E2 Series
Classifications
CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=EBC-21xx <=1.12.0.27
  2. Affected versionversion=EBC-21xx 1.12.13.2
  3. Affected versionversion=EBC-21xx 1.12.14.5
  4. Affected versionversion=EFD-22xx <=1.12.0.27
  5. Affected versionversion=EFD-22xx 1.12.13.2
  6. Affected versionversion=EFD-22xx 1.12.14.5
  7. Affected versionversion=ETHC-22xx <=1.12.0.27
  8. Affected versionversion=ETHC-22xx 1.12.13.2
  9. Affected versionversion=ETHC-22xx 1.12.14.5
  10. Affected versionversion=EWPC-22xx <=1.12.0.27
  11. Affected versionversion=EWPC-22xx 1.12.13.2
  12. Affected versionversion=EWPC-22xx 1.12.14.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Geutebrück · G-Cam/E2 Seriesversion=EBC-21xx <=1.12.0.27; version=EBC-21xx 1.12.13.2; version=EBC-21xx 1.12.14.5; version=EFD-22xx <=1.12.0.27; version=EFD-22xx 1.12.13.2; version=EFD-22xx 1.12.14.5; version=ETHC-22xx <=1.12.0.27; version=ETHC-22xx 1.12.13.2; version=ETHC-22xx 1.12.14.5; version=EWPC-22xx <=1.12.0.27; version=EWPC-22xx 1.12.13.2; version=EWPC-22xx 1.12.14.5
Geutebrück · Encoder G-Codeversion=EEC-2xx <=1.12.0.27; version=EEC-2xx 1.12.13.2; version=EEC-2xx 1.12.14.5; version=EEN-20xx <=1.12.0.27; version=EEN-20xx 1.12.13.2; version=EEN-20xx 1.12.14.5

Published CVSS scores

7.2CERT@VDECVSS:3.1/AV:N/AC:L/PR:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1190Exploit Public-Facing Application

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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