CVE-2022-3218: Due to a reliance on client-side authentication, the WiFi Mouse (Mouse Server) from Necta LLC's authentication

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2022-3218 is a critical-severity flaw (CVSS 9.8) affecting wifi mouse server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Due to a reliance on client-side authentication, the WiFi Mouse (Mouse Server) from Necta LLC's authentication mechanism is trivially bypassed, which can result in remote code execution.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	74.2% (top 1%)
CISA exploited list	No
Weakness	CWE-603, CWE-287
Published	2022-09-19
Last modified	2026-06-17

Publisher (CNA): Rapid7, Inc. · Vendor: necta

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

Am I affected?

Timeline

2022-09-19 17:15 UTCPublished CVE record published
2026-06-17 04:59 UTCUpdated Record last modified

necta wifi mouse server DOWNGRADE

Affected: 1.7.8.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.8.5

1. Check installed version

apt-cache policy wifi-mouse-server || rpm -q wifi-mouse-server || wifi-mouse-server --version

2. No fixed release: DOWNGRADE to a release before 1.7.8.5 (Debian / Ubuntu)

apt-cache madison wifi-mouse-server sudo apt install wifi-mouse-server=<VERSION_BEFORE_1.7.8.5> sudo apt-mark hold wifi-mouse-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list wifi-mouse-server sudo dnf downgrade wifi-mouse-server-<VERSION_BEFORE_1.7.8.5> sudo dnf versionlock add wifi-mouse-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · lib3mf · FIXED · 2.2.0-25.fc46 · FEDORA-2026-e250630e59 · source

sudo dnf upgrade --advisory=FEDORA-2026-e250630e59

Fedora ELN · libslirp · FIXED · 4.9.7-1.eln159 · FEDORA-2026-209cb94e13 · source

sudo dnf upgrade --advisory=FEDORA-2026-209cb94e13

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: mermehr/MouseServer-1.7.8.5-RCE (1 stars)
GitHub PoC: MoisesTapia/cve-2022-3218 (0 stars)
Write-up: www.exploit-db.com/exploits/49601
Write-up: www.exploit-db.com/exploits/50972
Metasploit: Wifi Mouse RCE

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-2022-3218?

wifi mouse server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-3218 being exploited?

CVE-2022-3218 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-2022-3218 affect?

CVE-2022-3218 affects wifi mouse server. Severity is critical (CVSS 9.8). Due to a reliance on client-side authentication, the WiFi Mouse (Mouse Server) from Necta LLC's authentication mechanism is trivially bypassed, which can result in remote code execution.

How urgent is CVE-2022-3218?

Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Wi-Fi vulnerabilities

References

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