CVE-2021-47824

HIGH

iDailyDiary 4.30 - Denial of Service via Preferences Tab Name Field Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47824. PoCs published by Ismael Nava.

AI-analyzed exploit summary This exploit triggers a Denial of Service (DoS) in iDailyDiary 4.30 by overwriting a configuration field with an excessively large buffer (2,000,000 bytes). The PoC creates a text file containing the buffer, which when pasted into the 'Default diary tab name' field causes the application to crash.

Description

iDailyDiary 4.30 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the preferences tab name field. Attackers can paste a 2,000,000 character buffer into the default diary tab name to trigger an application crash.

Exploits (1)

exploitdb WORKING POC
by Ismael Nava · textdoswindows
https://www.exploit-db.com/exploits/49898

This exploit triggers a Denial of Service (DoS) in iDailyDiary 4.30 by overwriting a configuration field with an excessively large buffer (2,000,000 bytes). The PoC creates a text file containing the buffer, which when pasted into the 'Default diary tab name' field causes the application to crash.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: iDailyDiary 4.30
No auth needed
Prerequisites: iDailyDiary 4.30 installed · ability to run Python script · access to the application's preferences menu
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/49898
Various Sources product
https://www.splinterware.com/index.html

Scores

CVSS v3 7.5
EPSS 0.0030
EPSS Percentile 21.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

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