CVE-2019-16313: ifw8 Router ROM v4.31 allows credential disclosure by reading the action/usermanager.htm HTML source code.

This week

HIGH 7.5REMOTEMITIGATEMITIGATEMITIGATE

CVE-2019-16313 is a high-severity flaw (CVSS 7.5) affecting fr6 firmware, fr8 firmware, fr5 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ifw8 Router ROM v4.31 allows credential disclosure by reading the action/usermanager.htm HTML source code.

Why this priority

High severity
EPSS top 1%: 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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	46.1% (top 1%)
CISA exploited list	No
Weakness	CWE-798
Published	2019-09-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ifw8

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

Am I affected?

Timeline

2019-09-14 16:15 UTCPublished CVE record published
2026-06-17 02:22 UTCUpdated Record last modified

ifw8 fr6 firmware MITIGATE

Affected: 4.31

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.31

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.

ifw8 fr8 firmware MITIGATE

Affected: 4.31

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.31

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.

ifw8 fr5 firmware MITIGATE

Affected: 4.31

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.31

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.

ifw8 fr5-e firmware MITIGATE

Affected: 4.31

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.31

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.

ifw8 fr6-s firmware MITIGATE

Affected: 4.31

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.31

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.

Nuclei scan template: ifw8 Router ROM v4.31 - Credential Discovery

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-2019-16313?

fr6 firmware: mitigate or apply the listed mitigation; fr8 firmware: mitigate or apply the listed mitigation; fr5 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-16313 being exploited?

CVE-2019-16313 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-2019-16313 affect?

CVE-2019-16313 affects fr6 firmware, fr8 firmware, fr5 firmware. Severity is high (CVSS 7.5). ifw8 Router ROM v4.31 allows credential disclosure by reading the action/usermanager.htm HTML source code.

How urgent is CVE-2019-16313?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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