CVE-2021-47824Public exploit

Application crash via oversized tab name

Published Jan 16, 2026 · Updated Jan 16, 2026

Improper input validation in Splinterware iDailyDiary 4.30 allows local users to crash the application via an oversized tab name. The Preferences Tabs field accepts a pasted 2,000,000-character default diary tab name and processes it when Apply is selected without enforcing a safe length limit. Exploitation requires access to the Windows desktop interface and interrupts only the running diary application; no confidentiality or integrity impact is reported.

CVSS severity4.6
Medium
EPSS probability0.35%
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 Splinterware iDailyDiary 4.30 allows local users to crash the application via an oversized tab name. The Preferences Tabs field accepts a pasted 2,000,000-character default diary tab name and processes it when Apply is selected without enforcing a safe length limit. Exploitation requires access to the Windows desktop interface and interrupts only the running diary application; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2021-47824
Published
Jan 16, 2026
Updated
Jan 16, 2026
Vendor
Splinterware
Product
iDailyDiary
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=4.30

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Splinterware · iDailyDiaryversion=4.30

Published CVSS scores

4.6VulnCheck CNACVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
7.5VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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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