CVE-2017-3191: D-Link DIR-130 firmware version 1.23 and DIR-330 firmware version 1.12 are vulnerable to authentication bypass

This week

CRITICAL 9.8REMOTEMITIGATEMITIGATE

CVE-2017-3191 is a critical-severity flaw (CVSS 9.8) affecting dir-130 firmware, dir-330 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

D-Link DIR-130 firmware version 1.23 and DIR-330 firmware version 1.12 are vulnerable to authentication bypass of the remote login page. A remote attacker that can access the remote management login page can manipulate the POST request in such a manner as to access some administrator-only pages such as tools_admin.asp without credentials.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
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	62.5% (top 1%)
CISA exploited list	No
Weakness	CWE-294, CWE-20
Published	2017-12-16
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: d-link

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

Am I affected?

Timeline

2017-12-16 02:29 UTCPublished CVE record published
2026-06-17 01:17 UTCUpdated Record last modified

d-link dir-130 firmware MITIGATE

Affected: 1.23

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.23

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.

d-link dir-330 firmware MITIGATE

Affected: 1.12

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.12

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-2017-3191?

dir-130 firmware: mitigate or apply the listed mitigation; dir-330 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-3191 being exploited?

CVE-2017-3191 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-2017-3191 affect?

CVE-2017-3191 affects dir-130 firmware, dir-330 firmware. Severity is critical (CVSS 9.8). D-Link DIR-130 firmware version 1.23 and DIR-330 firmware version 1.12 are vulnerable to authentication bypass of the remote login page. A remote attacker that can access the remote management login page can manipulate the POST request in s

How urgent is CVE-2017-3191?

Priority 64/100. Critical severity; EPSS top 1%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2017-3192 CRITICAL 9.8 MITIGATE MITIGATE D-Link DIR-130 firmware version 1.23 and DIR-330 firmware version 1.12 do not sufficiently protect administrat

References

← Back to latest CVEs