CVE-2019-6015: FON2601E-SE, FON2601E-RE, FON2601E-FSW-S, and FON2601E-FSW-B with firmware versions 1.1.7 and earlier contain

Q: How do I fix CVE-2019-6015?

fon2601e-se firmware: upgrade to newer than 1.1.7; fon2601e-re firmware: upgrade to newer than 1.1.7; fon2601e-fsw-s firmware: upgrade to newer than 1.1.7. Exact commands for each OS are on this page.

Q: Is CVE-2019-6015 being exploited?

CVE-2019-6015 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-2019-6015 affect?

CVE-2019-6015 affects fon2601e-se firmware, fon2601e-re firmware, fon2601e-fsw-s firmware. Severity is high (CVSS 7.5). FON2601E-SE, FON2601E-RE, FON2601E-FSW-S, and FON2601E-FSW-B with firmware versions 1.1.7 and earlier contain an issue where they may behave as open resolvers. If this vulnerability is exploited, FON routers may be leveraged for DNS amplifi

Q: How urgent is CVE-2019-6015?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE

CVE-2019-6015 is a high-severity flaw (CVSS 7.5) affecting fon2601e-se firmware, fon2601e-re firmware, fon2601e-fsw-s firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FON2601E-SE, FON2601E-RE, FON2601E-FSW-S, and FON2601E-FSW-B with firmware versions 1.1.7 and earlier contain an issue where they may behave as open resolvers. If this vulnerability is exploited, FON routers may be leveraged for DNS amplification attacks to some other entities.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-400
Published	2019-10-04
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: fon

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

Am I affected?

Timeline

2019-10-04 19:15 UTCPublished CVE record published
2026-06-17 02:38 UTCUpdated Record last modified

fon fon2601e-se firmware UPGRADE

Affected: <= 1.1.7

Fixed in: newer than 1.1.7

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.

fon fon2601e-re firmware UPGRADE

Affected: <= 1.1.7

Fixed in: newer than 1.1.7

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.

fon fon2601e-fsw-s firmware UPGRADE

Affected: <= 1.1.7

Fixed in: newer than 1.1.7

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.

fon fon2601e-fsw-b firmware UPGRADE

Affected: <= 1.1.7

Fixed in: newer than 1.1.7

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-2019-6015?

fon2601e-se firmware: upgrade to newer than 1.1.7; fon2601e-re firmware: upgrade to newer than 1.1.7; fon2601e-fsw-s firmware: upgrade to newer than 1.1.7. Exact commands for each OS are on this page.

Is CVE-2019-6015 being exploited?

CVE-2019-6015 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-2019-6015 affect?

CVE-2019-6015 affects fon2601e-se firmware, fon2601e-re firmware, fon2601e-fsw-s firmware. Severity is high (CVSS 7.5). FON2601E-SE, FON2601E-RE, FON2601E-FSW-S, and FON2601E-FSW-B with firmware versions 1.1.7 and earlier contain an issue where they may behave as open resolvers. If this vulnerability is exploited, FON routers may be leveraged for DNS amplifi

How urgent is CVE-2019-6015?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

References

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