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PatchSiren cyber security CVE debrief

CVE-2021-47972 Exploit Db CVE debrief

CVE-2021-47972 describes a denial-of-service condition in Sticky Notes & Color Widgets 1.4.2. According to the supplied sources, attackers can create notes containing excessively long character strings, causing the application to crash or stop responding. The issue is mapped to CWE-789 in the source record and is rated HIGH with a CVSS score of 8.7 in the supplied NVD data.

Vendor
Exploit Db
Product
Unknown
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-16
Original CVE updated
2026-05-18
Advisory published
2026-05-16
Advisory updated
2026-05-18

Who should care

Anyone running Sticky Notes & Color Widgets 1.4.2 should care, especially desktop support teams, end users, and security operators responsible for application stability on endpoints. If the app is used in daily workflows, a crash or hang can create immediate availability impact.

Technical summary

The supplied record indicates an input-driven denial of service in Sticky Notes & Color Widgets 1.4.2. Very long note content can trigger application failure, likely through insufficient bounds handling or resource management in note-field processing. The source metadata associates the weakness with CWE-789 and includes references to an Exploit-DB entry and a VulnCheck advisory.

Defensive priority

High. This is an availability-impacting flaw that can interrupt user workflows and repeatedly crash the application. Even without evidence of code execution, the ability to reliably stop the app from responding makes remediation and version inventory important.

Recommended defensive actions

  • Inventory systems running Sticky Notes & Color Widgets 1.4.2 and determine exposure.
  • Limit or monitor unusually long pasted text in note fields where administrative controls are available.
  • Upgrade or replace the affected application version if a fixed release is available from the vendor or trusted distributor.
  • Track repeated app crashes or hangs that correlate with note creation or editing.
  • If remediation is not immediately available, reduce reliance on the affected version and isolate it on endpoints where practical.
  • Validate remediation using safe, non-production testing with representative input lengths rather than weaponized payloads.

Evidence notes

The conclusion is based only on the supplied source corpus: the NVD record for CVE-2021-47972, the referenced Exploit-DB entry, and the linked VulnCheck advisory. The source metadata states that oversized character strings in note fields can crash the application, and the weakness is labeled CWE-789. No patch status, exploit details, or affected-version expansion beyond Sticky Notes & Color Widgets 1.4.2 was supplied.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-47972 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-47972

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-47972 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-47972

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.