CVE-2017-16934: The web server on DBL DBLTek devices allows remote attackers to execute arbitrary OS commands by obtaining the

Q: How do I fix CVE-2017-16934?

web server: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2017-16934 being exploited?

CVE-2017-16934 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-2017-16934 affect?

CVE-2017-16934 affects web server. Severity is critical (CVSS 9.8). The web server on DBL DBLTek devices allows remote attackers to execute arbitrary OS commands by obtaining the admin password via a frame.html?content=/dev/mtdblock/5 request, and then using this password for the HTTP Basic Authentication n

Q: How urgent is CVE-2017-16934?

Priority 68/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2017-16934 is a critical-severity flaw (CVSS 9.8) affecting web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The web server on DBL DBLTek devices allows remote attackers to execute arbitrary OS commands by obtaining the admin password via a frame.html?content=/dev/mtdblock/5 request, and then using this password for the HTTP Basic Authentication needed for a change_password.csp request, which supports a "<%%25call system.exec:" string in the passwd parameter.

Why this priority

Critical severity
EPSS top 4%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	13.5% (top 4%)
CISA exploited list	No
Weakness	CWE-78
Published	2017-11-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dbltek

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

Am I affected?

Timeline

2017-11-24 07:29 UTCPublished CVE record published
2026-06-17 01:10 UTCUpdated Record last modified

dbltek web server MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy web-server || rpm -q web-server || web-server --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Public exploits and detection

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

Exploit-DB: DblTek - Multiple Vulnerabilities

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-2017-16934?

web server: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-16934 being exploited?

CVE-2017-16934 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-2017-16934 affect?

CVE-2017-16934 affects web server. Severity is critical (CVSS 9.8). The web server on DBL DBLTek devices allows remote attackers to execute arbitrary OS commands by obtaining the admin password via a frame.html?content=/dev/mtdblock/5 request, and then using this password for the HTTP Basic Authentication n

How urgent is CVE-2017-16934?

Priority 68/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

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References

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