CVE-2021-47973
📛 CVE Title
(no title)
Description
Sticky Notes Widget 3.0.6 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings into note fields. Attackers can generate a payload containing 350000 repeated characters and paste it twice into a new note to trigger an application crash on iOS devices.
Overview
- State
- —
- Assigner (CNA)
- —
- CVSS severity
- high
- CVSS score
- 7.5 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Effective score
- 7.5 / 10 HIGH source: CNA overview
- CWE(s)
- —
- Reserved
- —
- Published
- —
- Last updated
- —
- Source
- https://www.tenable.com/cve/CVE-2021-47973
- Linked Threat
- CVE-2021-47973 — CVE-2021-47973
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-16 16:16:22 UTC
- NVD last modified
- 2026-05-18 17:32:04 UTC
- NVD CVSS v3.1
- 7.5 / 10 HIGH source: disclosure@vulncheck.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 3.6 / 10
- EPSS score
- 0.0005 (probability of exploitation in next 30 days)
- EPSS percentile
- 16.41% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD-assigned CWE(s):
CWE-789
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-05-25 00:06 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2021-34832 - Assigner
- VulnCheck
- Published
- May 16, 2026, 3:26:13 PM
- Updated
- May 18, 2026, 12:39:53 PM
- EUVD base score (CVSS 4.0)
-
8.7 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - EUVD-reported EPSS
- 0.0500
- Vendors
- sticky-notes
- Products
-
Sticky Notes Widget (3.0.6)
- Aliases
-
GHSA-cf4r-4q6g-m584
ENISA description: Sticky Notes Widget 3.0.6 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings into note fields. Attackers can generate a payload containing 350000 repeated characters and paste it twice into a new note to trigger an application crash on iOS devices.
Vendor references (0)
References embedded in the original CVE record by the assigning CNA.
None in the CVE record.
Web references (5)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://nvd.nist.gov/vuln/detail/CVE-2021-47973 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2021-47973 tenable:www.cve.org
- https://www.exploit-db.com/exploits/49978 tenable:www.exploit-db.com
- https://www.first.org/epss/ tenable:www.first.org
- https://www.vulncheck.com/advisories/sticky-notes-widget-denial-of-service-via-buffer-overflow tenable:www.vulncheck.com
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://www.exploit-db.com/exploits/49978 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/sticky-notes-widget-denial-of-service-via-buffer-overflow disclosure@vulncheck.com
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:learn.microsoft.com
Windows 11, version 25H2 is now available for all eligible devices. Devices running Home and Pro editions of Windows 11 that are not managed by IT departments will receive the update to Windows 11, version 25H2 through the machine learning-based intelligent rollout.
2026-05-26 02:55 UTC -
web:nvd.nist.gov
The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...
2026-05-26 02:55 UTC -
web:thewincentral.com
Microsoft rolls out Windows 11 KB5083769 (April 2026 update). New features & fixes. How to download. - Read in Latest News on WinCentral
2026-05-26 02:55 UTC -
web:vulmon.com
Vulnerability details of CVE-2021-47973 CVE-2021-47973 - Denial of Service Vulnerability in Sticky Notes Widget 3.0.6 via Excessive Character Input
2026-05-26 02:55 UTC -
web:www.bleepingcomputer.com
Microsoft has released Windows 11 KB5079473 and KB5078883 cumulative updates for versions 25H2/24H2 and 23H2 to fix security vulnerabilities, bugs, and add new features.
2026-05-26 02:55 UTC -
web:www.neowin.net
Windows 11's March 2026 Patch Tuesday update is here under KB5079473 with File Explorer improvements and more.
2026-05-26 02:55 UTC -
web:www.notebookcheck.net
Microsoft's March 2026 Patch Tuesday fixes 79 flaws, including two publicly disclosed zero-days. Windows 11 gets KB5079473 and KB5078883, while Windows 10 receives KB5078885.
2026-05-26 02:55 UTC -
web:www.pcworld.com
Windows 11's Secure Boot fix update finally rolls out to more PCs Important security certificates for Windows 11 will soon expire for many users.
2026-05-26 02:55 UTC -
web:www.windowscentral.com
Microsoft's March Patch Tuesday updates are rolling out on Windows 11, and this month there's some actually good improvements coming to enhance your PC.
2026-05-26 02:55 UTC -
web:www.windowslatest.com
Windows 11 March 2026 Patch Tuesday update adds Emoji 16.0, Sysmon, network speed test, reliability improvements, and security fixes.
2026-05-26 02:55 UTC
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