CVE-2022-47891: All versions of NetMan 204 allow an attacker that knows the MAC and serial number of the device to reset the a

This month

HIGH 8.1MITIGATE

CVE-2022-47891 is a high-severity flaw (CVSS 8.1) affecting netman 204 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

All versions of NetMan 204 allow an attacker that knows the MAC and serial number of the device to reset the administrator password via the legitimate recovery function.

Why this priority

High severity

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

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-798
Published	2023-10-03
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: riello-ups

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

Am I affected?

Timeline

2023-10-03 12:15 UTCPublished CVE record published
2026-06-17 05:14 UTCUpdated Record last modified

riello-ups netman 204 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

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-2022-47891?

netman 204 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-47891 being exploited?

CVE-2022-47891 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-2022-47891 affect?

CVE-2022-47891 affects netman 204 firmware. Severity is high (CVSS 8.1). All versions of NetMan 204 allow an attacker that knows the MAC and serial number of the device to reset the administrator password via the legitimate recovery function.

How urgent is CVE-2022-47891?

Priority 41/100. High severity

Related CVEs

CVE-2024-8878 CRITICAL 9.8 UPGRADE The password recovery mechanism for the forgotten password in Riello Netman 204 allows an attacker to reset th
CVE-2024-8877 CRITICAL 9.8 UPGRADE Improper neutralization of special elements results in a SQL Injection vulnerability in Riello Netman 204
CVE-2022-47893 CRITICAL 10.0 MITIGATE There is a remote code execution vulnerability that affects all versions of NetMan 204
CVE-2022-47892 MEDIUM 5.3 MITIGATE All versions of NetMan 204 could allow an unauthenticated remote attacker to read a file (config.cgi) containi

References

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