CVE-2025-21068VulnerabilityPublished 10 Oct 2025

CVE-2025-21068: Samsung Notes · Out-of-bounds Read

Affects Samsung NotesSource CVE Database V5

Not known to be exploited · CVSS 4.0 Medium : upgrade to 4.4.30.63 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

4.0Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.4.30.63

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector: Local
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Samsung Notes to 4.4.30.63.

Affected software

Product	Affected	Fixed in
Samsung Mobile Samsung Notes	Affected <4.4.30.63	Fixed in 4.4.30.63

AI-suggested

European organizations should prioritize updating Samsung Notes to version 4.4.30.63 or later as soon as the patch becomes available to remediate the vulnerability. Until patches are deployed, organizations should enforce strict physical security controls to prevent unauthorized local access to devices, including locking devices when unattended and using strong authentication mechanisms. Mobile device management (MDM) solutions should be configured to restrict installation of unapproved applications and monitor device usage for suspicious activity. Additionally, organizations should educate users about the risks of sharing devices and encourage the use of secure note-taking alternatives if sensitive data is involved. Regular audits of device software versions and configurations can help identify vulnerable devices. For high-security environments, consider disabling or restricting the use of Samsung Notes until the vulnerability is patched. Finally, monitoring for unusual application crashes or memory-related errors may help detect exploitation attempts.

Description

Out-of-bounds read in the reading of image data in Samsung Notes prior to version 4.4.30.63 allows local attackers to access out-of-bounds memory.

Impact

For European organizations, the primary impact of CVE-2025-21068 lies in potential unauthorized disclosure of memory contents on Samsung mobile devices running vulnerable versions of Samsung Notes. While the vulnerability does not directly compromise confidentiality or availability, the out-of-bounds read can expose sensitive information stored in memory, potentially aiding attackers in crafting further attacks or gaining insights into application internals. Organizations with mobile device management policies that allow shared device usage or insufficient physical security controls are at higher risk. The vulnerability could also lead to application crashes or instability, disrupting user productivity. Given the widespread use of Samsung devices across Europe, especially in enterprise and government sectors, this vulnerability could affect a significant number of endpoints. However, the requirement for local access limits the attack surface primarily to insiders or attackers with physical device access, reducing the likelihood of large-scale exploitation. Nonetheless, the exposure of sensitive memory data could have compliance and data protection implications under regulations such as GDPR if personal or confidential information is leaked.

CWE-125Out-of-bounds Read (opens in a new tab)
Base weaknessCWE Top 25 (2025): #8
The product reads data past the end, or before the beginning, of the intended buffer.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
Architecture and Design · Language Selection
Use a language that provides appropriate memory abstractions.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
Attack patterns
Overread Buffers (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

security.samsungmobile.com/serviceWeb.smsb?year=2025&month=10 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 10 Oct 2025, 06:51 UTC

WeaknessesCWE-125

Technical details

References

Community reviews

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