CVE-2025-21075VulnerabilityPublished 5 Nov 2025Updated 7 Nov 2025

CVE-2025-21075: Samsung Mobile Devices · Out-of-bounds Write

Affects Samsung Mobile DevicesSource CVE Database V5

Not known to be exploited · CVSS 4.3 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score

4.3Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 19% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

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

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

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
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: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
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 5 Nov 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 2026-10-26.

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

AI-suggested

1. Deploy the Samsung Security Maintenance Release (SMR) November 2025 update promptly on all affected Samsung Mobile Devices to patch the vulnerability. 2. Implement mobile device management (MDM) solutions that enforce timely OS and security patch updates. 3. Educate users about the risks of opening unsolicited or suspicious image files, especially from unknown sources or untrusted messaging platforms. 4. Employ advanced mobile threat defense (MTD) solutions capable of detecting and blocking malicious media files or suspicious app behavior. 5. Restrict or monitor the use of third-party applications that handle image processing if they do not come from trusted sources. 6. Use network-level protections such as secure email gateways and web filtering to block delivery of malicious content. 7. Conduct regular security awareness training focusing on social engineering tactics that could lead to exploitation of this vulnerability. 8. Monitor device logs and behavior for signs of memory corruption or abnormal crashes that could indicate exploitation attempts. 9. Coordinate with Samsung support and security advisories to stay informed about any emerging exploits or additional patches. 10. Consider isolating critical mobile devices or sensitive applications from general user devices to limit potential impact.

Description

Out-of-bounds write in libimagecodec.quram.so prior to SMR Nov-2025 Release 1 allows remote attackers to access out-of-bounds memory.

Impact

For European organizations, the primary impact of CVE-2025-21075 lies in the potential compromise of device integrity on Samsung Mobile Devices used by employees. While the vulnerability does not directly affect confidentiality or availability, memory corruption could lead to application crashes or unpredictable device behavior, disrupting business operations. In worst-case scenarios, if chained with other vulnerabilities, it could enable remote code execution, posing a significant security risk. Given the widespread adoption of Samsung smartphones and tablets across Europe, especially in corporate environments where mobile devices are integral to daily operations, this vulnerability could be exploited to target employees via malicious media files. This could facilitate espionage, data tampering, or lateral movement within corporate networks. The requirement for user interaction means social engineering or phishing campaigns could be effective attack vectors. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits post-disclosure. Therefore, European organizations must consider this vulnerability in their mobile device management and security policies to prevent potential exploitation.

CWE-787Out-of-bounds Write (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #5
The product writes data past the end, or before the beginning, of the intended buffer.
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Operation · Build and Compilation · Environment Hardening
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index…
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)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

security.samsungmobile.com/securityUpdate.smsb?year=2025&month=11 (opens in a new tab)

Community reviews

Loading reviews…

Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 12 Nov 2025, 07:14 UTC

WeaknessesCWE-787

Technical details

References

Community reviews

Related threats