CVE-2021-33549: Multiple camera devices by UDP Technology, Geutebrück and other vendors are vulnerable to a stack-based buffer

Q: How do I fix CVE-2021-33549?

g-cam ebc-2110 firmware: upgrade to newer than 1.12.0.27; g-cam ebc-2111 firmware: upgrade to newer than 1.12.0.27; g-cam efd-2241 firmware: upgrade to newer than 1.12.0.27. Exact commands for each OS are on this page.

Q: Is CVE-2021-33549 being exploited?

CVE-2021-33549 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-33549 affect?

CVE-2021-33549 affects g-cam ebc-2110 firmware, g-cam ebc-2111 firmware, g-cam efd-2241 firmware. Severity is high (CVSS 7.2). Multiple camera devices by UDP Technology, Geutebrück and other vendors are vulnerable to a stack-based buffer overflow condition in the action parameter, which may allow an attacker to remotely execute arbitrary code.

Q: How urgent is CVE-2021-33549?

Priority 55/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference

This week

HIGH 7.2UPGRADEUPGRADEUPGRADE

CVE-2021-33549 is a high-severity flaw (CVSS 7.2) affecting g-cam ebc-2110 firmware, g-cam ebc-2111 firmware, g-cam efd-2241 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple camera devices by UDP Technology, Geutebrück and other vendors are vulnerable to a stack-based buffer overflow condition in the action parameter, which may allow an attacker to remotely execute arbitrary code.

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	67.3% (top 1%)
CISA exploited list	No
Weakness	CWE-121
Published	2021-09-13
Last modified	2026-06-17

Publisher (CNA): CERT VDE · Vendor: geutebrueck

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-09-13 18:15 UTCPublished CVE record published
2026-06-17 03:54 UTCUpdated Record last modified

geutebrueck g-cam ebc-2110 firmware UPGRADE

Affected: <= 1.12.0.27 · 1.12.13.2 · 1.12.14.5

Fixed in: newer than 1.12.0.27

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

geutebrueck g-cam ebc-2111 firmware UPGRADE

Affected: <= 1.12.0.27 · 1.12.13.2 · 1.12.14.5

Fixed in: newer than 1.12.0.27

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

geutebrueck g-cam efd-2241 firmware UPGRADE

Affected: <= 1.12.0.27 · 1.12.13.2 · 1.12.14.5

Fixed in: newer than 1.12.0.27

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

geutebrueck g-cam efd-2250 firmware UPGRADE

Affected: <= 1.12.0.27 · 1.12.13.2 · 1.12.14.5

Fixed in: newer than 1.12.0.27

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

geutebrueck g-cam ethc-2230 firmware UPGRADE

Affected: <= 1.12.0.27 · 1.12.13.2 · 1.12.14.5

Fixed in: newer than 1.12.0.27

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

geutebrueck g-cam ethc-2239 firmware UPGRADE

Affected: <= 1.12.0.27 · 1.12.13.2 · 1.12.14.5

Fixed in: newer than 1.12.0.27

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Metasploit: Geutebruck instantrec Remote Command Execution

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-33549?

g-cam ebc-2110 firmware: upgrade to newer than 1.12.0.27; g-cam ebc-2111 firmware: upgrade to newer than 1.12.0.27; g-cam efd-2241 firmware: upgrade to newer than 1.12.0.27. Exact commands for each OS are on this page.

Is CVE-2021-33549 being exploited?

CVE-2021-33549 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-33549 affect?

CVE-2021-33549 affects g-cam ebc-2110 firmware, g-cam ebc-2111 firmware, g-cam efd-2241 firmware. Severity is high (CVSS 7.2). Multiple camera devices by UDP Technology, Geutebrück and other vendors are vulnerable to a stack-based buffer overflow condition in the action parameter, which may allow an attacker to remotely execute arbitrary code.

How urgent is CVE-2021-33549?

Priority 55/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2021-33554 HIGH 7.2 UPGRADE UPGRADE Multiple camera devices by UDP Technology, Geutebrück and other vendors are vulnerable to command injection, w
CVE-2021-33553 HIGH 7.2 UPGRADE UPGRADE Multiple camera devices by UDP Technology, Geutebrück and other vendors are vulnerable to command injection, w
CVE-2021-33552 HIGH 7.2 UPGRADE UPGRADE Multiple camera devices by UDP Technology, Geutebrück and other vendors are vulnerable to command injection, w
CVE-2021-33551 HIGH 7.2 UPGRADE UPGRADE Multiple camera devices by UDP Technology, Geutebrück and other vendors are vulnerable to command injection, w
CVE-2021-33550 HIGH 7.2 UPGRADE UPGRADE Multiple camera devices by UDP Technology, Geutebrück and other vendors are vulnerable to command injection, w

References

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