CVE-2021-47821

HIGH

RarmaRadio 2.72.8 - Denial of Service via Network Configuration Field Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47821. PoCs published by Ismael Nava.

AI-analyzed exploit summary This exploit generates a large buffer of characters to trigger a Denial of Service (DoS) in RarmaRadio 2.72.8 by overwriting a text file used in the application's network settings. The PoC creates a file named 'Lambda.txt' containing 100,000 'Ñ' characters, which when pasted into specific fields causes the application to crash.

Description

RarmaRadio 2.72.8 contains a denial of service vulnerability that allows attackers to crash the application by overflowing network configuration fields with large character buffers. Attackers can generate a 100,000 character buffer and paste it into multiple network settings fields to trigger application instability and potential crash.

Exploits (1)

exploitdb WORKING POC
by Ismael Nava · pythondoswindows
https://www.exploit-db.com/exploits/49906

This exploit generates a large buffer of characters to trigger a Denial of Service (DoS) in RarmaRadio 2.72.8 by overwriting a text file used in the application's network settings. The PoC creates a file named 'Lambda.txt' containing 100,000 'Ñ' characters, which when pasted into specific fields causes the application to crash.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: RarmaRadio 2.72.8
No auth needed
Prerequisites: RarmaRadio 2.72.8 installed on Windows · Access to the application's settings interface
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/49906
Various Sources product
http://www.raimersoft.com/
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/rarmaradio-denial-of-service

Scores

CVSS v3 7.5
EPSS 0.0037
EPSS Percentile 28.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-1284
Status published
Published Jan 16, 2026
Tracked Since Feb 18, 2026