CVE-2025-9581: A vulnerability was detected in Comfast CF-N1 2.6.0

This month

MEDIUM 6.3MITIGATE

CVE-2025-9581 is a medium-severity flaw (CVSS 6.3) affecting cf-n1 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was detected in Comfast CF-N1 2.6.0. This impacts the function multi_pppoe of the file /usr/bin/webmgnt. Performing manipulation of the argument phy_interface results in command injection. The attack may be initiated remotely. The exploit is now public and may be used.

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	4.8% (top 8%)
CISA exploited list	No
Weakness	CWE-74, CWE-77
Published	2025-08-28
Last modified	2026-09-26

Publisher (CNA): VulDB · Vendor: comfast

Last updated 2026-09-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-28 19:15 UTCPublished CVE record published
2026-09-26 00:10 UTCUpdated Record last modified

comfast cf-n1 firmware MITIGATE

Affected: 2.6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.6.0

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-2025-9581?

cf-n1 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-9581 being exploited?

CVE-2025-9581 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-2025-9581 affect?

CVE-2025-9581 affects cf-n1 firmware. Severity is medium (CVSS 6.3). A vulnerability was detected in Comfast CF-N1 2.6.0. This impacts the function multi_pppoe of the file /usr/bin/webmgnt. Performing manipulation of the argument phy_interface results in command injection. The attack may be initiated remotel

How urgent is CVE-2025-9581?

Priority 50/100. EPSS top 8%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2025-9584 MEDIUM 6.3 MITIGATE A vulnerability was found in Comfast CF-N1 2.6.0
CVE-2025-9586 MEDIUM 6.3 MITIGATE A vulnerability was identified in Comfast CF-N1 2.6.0
CVE-2025-9582 MEDIUM 6.3 MITIGATE A flaw has been found in Comfast CF-N1 2.6.0
CVE-2025-9583 MEDIUM 6.3 MITIGATE A vulnerability has been found in Comfast CF-N1 2.6.0
CVE-2025-9585 MEDIUM 6.3 MITIGATE A vulnerability was determined in Comfast CF-N1 2.6.0

References

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