CVE-2012-4697: TURCK BL20 Programmable Gateway and BL67 Programmable Gateway have hardcoded accounts, which allows remote att

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HIGH 10.0MITIGATEMITIGATEMITIGATE

CVE-2012-4697 is a high-severity flaw (CVSS 10.0) affecting bl20 programmable gateway, bl67 programmable gateway, bl20 programmable gateway firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TURCK BL20 Programmable Gateway and BL67 Programmable Gateway have hardcoded accounts, which allows remote attackers to obtain administrative access via an FTP session.

Why this priority

Critical severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Weakness	CWE-255
Published	2013-05-23
Last modified	2026-06-16

Publisher (CNA): ICS-CERT · Vendor: turck

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-05-23 17:55 UTCPublished CVE record published
2026-06-16 23:45 UTCUpdated Record last modified

turck bl20 programmable gateway MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

turck bl67 programmable gateway MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

turck bl20 programmable gateway firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

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.

turck bl67 programmable gateway firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

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.

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-2012-4697?

bl20 programmable gateway: mitigate or apply the listed mitigation; bl67 programmable gateway: mitigate or apply the listed mitigation; bl20 programmable gateway firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-4697 being exploited?

CVE-2012-4697 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-2012-4697 affect?

CVE-2012-4697 affects bl20 programmable gateway, bl67 programmable gateway, bl20 programmable gateway firmware. Severity is high (CVSS 10.0). TURCK BL20 Programmable Gateway and BL67 Programmable Gateway have hardcoded accounts, which allows remote attackers to obtain administrative access via an FTP session.

How urgent is CVE-2012-4697?

Priority 56/100. Critical severity

References

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