CVE-2021-47821Public exploit

Application crash via oversized network settings

Published Jan 16, 2026 · Updated Jan 16, 2026

Improper input validation in Raimersoft RarmaRadio 2.75.8 allows local users to crash the application through network settings. The Network settings dialog accepts a 100,000-character value in the Username, Server, Port, and User Agent fields without enforcing a safe length. Exploitation requires local access and active interaction to paste the generated text and confirm the dialog, interrupting the RarmaRadio process.

CVSS severity4.6
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Raimersoft RarmaRadio 2.75.8 allows local users to crash the application through network settings. The Network settings dialog accepts a 100,000-character value in the Username, Server, Port, and User Agent fields without enforcing a safe length. Exploitation requires local access and active interaction to paste the generated text and confirm the dialog, interrupting the RarmaRadio process.

The record

CVE
CVE-2021-47821
Published
Jan 16, 2026
Updated
Jan 16, 2026
Vendor
Raimersoft
Product
RarmaRadio
Classifications
CWE-1284, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2026Record 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=2.75.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Raimersoft · RarmaRadioversion=2.75.8

Published CVSS scores

7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.6VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/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.

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No observations available

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

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1499.004Application or System Exploitation

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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