CVE-2026-41039: This vulnerability exists in Quantum Networks router due to improper access control and insecure default confi

Routine

HIGH 7.5REMOTEMITIGATE

CVE-2026-41039 is a high-severity flaw (CVSS 7.5) affecting qn-i-470 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This vulnerability exists in Quantum Networks router due to improper access control and insecure default configuration in the web-based management interface. An unauthenticated attacker could exploit this vulnerability by accessing exposed API endpoints on the targeted device. Successful exploitation of this vulnerability could allow the attacker to access sensitive information, including internal endpoints, scripts and directories on the target

Why this priority

High severity
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	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-04-21
Last modified	2026-10-26

Publisher (CNA): Indian Computer Emergency Response Team (CERT-In) · Vendor: qntmnet

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 11:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

qntmnet qn-i-470 firmware MITIGATE

Affected: 6.1.1.b1

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.1.1.b1

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-2026-41039?

qn-i-470 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-41039 being exploited?

CVE-2026-41039 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-2026-41039 affect?

CVE-2026-41039 affects qn-i-470 firmware. Severity is high (CVSS 7.5). This vulnerability exists in Quantum Networks router due to improper access control and insecure default configuration in the web-based management interface. An unauthenticated attacker could exploit this vulnerability by accessing exposed

How urgent is CVE-2026-41039?

Priority 36/100. High severity; Remotely exploitable, no login, no user action

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References

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