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
- 2026-05-16
- Advisory published
- 2026-05-16
- Advisory updated
- 2026-05-16
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.
Official resources
The CVE was published in the supplied record on 2026-05-16. The NVD entry cites public references to Exploit-DB and a VulnCheck advisory, indicating the issue was already in public disclosure channels at the time the record was updated. No