CVE-2021-4465Public exploitNetwork attack vector

Unauthenticated shutdown or reboot via power command

Published Nov 14, 2025 · Updated Nov 14, 2025

Denial of service in ReQuest F3 Music and Movie Server affected builds allows remote attackers to shut down or reboot the appliance. The /remote/index.php handler accepts an unauthenticated cmd value of poweroff or reboot and invokes the corresponding device power action. A single network-reachable HTTP GET request is sufficient, interrupting all media-server availability without requiring an account.

CVSS severity8.7
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in ReQuest F3 Music and Movie Server affected builds allows remote attackers to shut down or reboot the appliance. The /remote/index.php handler accepts an unauthenticated cmd value of poweroff or reboot and invokes the corresponding device power action. A single network-reachable HTTP GET request is sufficient, interrupting all media-server availability without requiring an account.

The record

CVE
CVE-2021-4465
Published
Nov 14, 2025
Updated
Nov 14, 2025
Vendor
ReQuest Serious Play LLC
Product
ReQuest F3 Music and Movie Server
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 14, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.1.823
  2. Affected versionversion=6.3.2.4203
  3. Affected versionversion=6.4.2.4681
  4. Affected versionversion=6.5.2.4954
  5. Affected versionversion=7.0.2.4954
  6. Affected versionversion=7.0.3.4968

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ReQuest Serious Play LLC · ReQuest F3 Music and Movie Serverversion=2.0.1.823; version=6.3.2.4203; version=6.4.2.4681; version=6.5.2.4954; version=7.0.2.4954; version=7.0.3.4968

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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