Notes
CVE-2025-20921
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, read limits
MITRE ATT&CK
1 technique across 1 tactic: Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.09%. |
| Exploit ScenarioDerived | A local attacker with access to the system could read data from memory outside the intended buffer boundaries. |
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Alert meAnalysisAIv1 – Mar 28, 2026
Out-of-bounds read in applying binary of text content in Samsung Notes prior to version 4.4.26.71 allows attackers to read out-of-bounds memory. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. Out-of-bounds read in applying binary of text content in Samsung Notes prior to version 4.4.26.71 allows attackers to read out-of-bounds memory. Affected products include: Samsung Notes. Version information: version 4.4.26.71.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
Out-of-bounds read in applying binary of text content in Samsung Notes prior to version 4.4.26.71 allows attackers to read out-of-bounds memory.
Executive ViewAI
Organizations using applying binary of text content in Samsung Notes should be aware of moderate risk from CVE-2025-20921, a out-of-bounds read vulnerability rated CVSS 5.5. Exploitation could cause memory corruption or application crashes. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: enable ASLR/DEP, apply network segmentation.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)CVE.org
Stack-based out-of-bounds write in Samsung Notes prior to version 4.4.21.62 allows remote attackers to execute arbitrary
A vulnerability in the MIME message handling of the HCL Notes v9 client could potentially be exploited by an unauthentic
A vulnerability in the MIME message handling of the Notes client (versions 9 and 10) could potentially be exploited by a
A vulnerability in the input parameter handling of HCL Notes v9 could potentially be exploited by an authenticated attac
Heap-based out-of-bounds write in Samsung Notes prior to version 4.4.21.62 allows local attackers to execute arbitrary c
Path traversal in Samsung Notes prior to version 4.4.21.62 allows local attackers to execute arbitrary code. Rated high
Out-of-bounds write in applying connected information in Samsung Notes prior to version 4.4.21.62 allows local attackers
Out-of-bounds write in appending paragraph in Samsung Notes prior to version 4.4.21.62 allows local attackers to potenti
HCL Notes is susceptible to a stack based buffer overflow vulnerability in lasr.dll in Micro Focus KeyView. Rated high s
HCL Notes is susceptible to a stack based buffer overflow vulnerability in wp6sr.dll in Micro Focus KeyView. Rated high
HCL Notes is susceptible to a stack based buffer overflow vulnerability in lasr.dll in Micro Focus KeyView. Rated high s
A possible buffer overflow vulnerability in maetd_eco_cb_mode of libSPenBase library of Samsung Notes prior to Samsung N
GitHub PoC
Exploit-DB