CVE-2021-47851: Mini Mouse 9.2.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary com

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-47851 is a critical-severity flaw (CVSS 9.8) affecting mini mouse. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mini Mouse 9.2.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary commands through an unauthenticated HTTP endpoint. Attackers can leverage the /op=command endpoint to download and execute payloads by sending crafted JSON requests with malicious script commands.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
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	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-01-21
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: yodinfo

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

Am I affected?

Timeline

2026-01-21 18:16 UTCPublished CVE record published
2026-06-17 04:18 UTCUpdated Record last modified

yodinfo mini mouse DOWNGRADE

Affected: 9.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.2.0

1. Check installed version

apt-cache policy mini-mouse || rpm -q mini-mouse || mini-mouse --version

2. No fixed release: DOWNGRADE to a release before 9.2.0 (Debian / Ubuntu)

apt-cache madison mini-mouse sudo apt install mini-mouse=<VERSION_BEFORE_9.2.0> sudo apt-mark hold mini-mouse

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

dnf --showduplicates list mini-mouse sudo dnf downgrade mini-mouse-<VERSION_BEFORE_9.2.0> sudo dnf versionlock add mini-mouse

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 · proftpd · FIXED · 1.3.9e-2.fc46 · FEDORA-2026-fcb0a25c2f · source

sudo dnf upgrade --advisory=FEDORA-2026-fcb0a25c2f

Public exploits and detection

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

Write-up: www.exploit-db.com/exploits/49743

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-2021-47851?

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

Is CVE-2021-47851 being exploited?

CVE-2021-47851 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-2021-47851 affect?

CVE-2021-47851 affects mini mouse. Severity is critical (CVSS 9.8). Mini Mouse 9.2.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary commands through an unauthenticated HTTP endpoint. Attackers can leverage the /op=command endpoint to download and execute payloads b

How urgent is CVE-2021-47851?

Priority 65/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-47850 HIGH 7.5 DOWNGRADE Mini Mouse 9.2.0 contains a path traversal vulnerability that allows remote attackers to access arbitrary syst
CVE-2021-47849 MEDIUM 6.2 DOWNGRADE Mini Mouse 9.3.0 contains a path traversal vulnerability that allows attackers to access sensitive system dire

References

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