Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessGain adjacent-network proximity to target
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ExploitIntercept Samsung Flow pairing handshake
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ExecutionBypass improper authentication check
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ImpactAccess sensitive information over channel
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK
2 techniques across 2 tactics: Defense Evasion, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Exploitation requires the attacker to be on an adjacent network (AV:A) - within Bluetooth, Wi-Fi Direct, or the same local wireless segment used by Samsung Flow to link a Galaxy phone with a paired PC or tablet - and to satisfy a specific attack requirement (AT:P in the 4.0 vector), implying exploitation is not reliably repeatable on demand and likely depends on timing or an in-progress pairing/connection state. No authentication or user interaction is needed (PR:N/UI:N). Limiting factors: the victim must be actively running Samsung Flow on a vulnerable build (< 4.9.22.4), the attacker must be in physical/network proximity, and the conditional attack requirement reduces the probability of a successful single attempt - all of which constrain realistic exploitation well below what the network-less CVSS base might suggest. |
| Impact | This is a moderate-severity information-disclosure flaw whose real-world risk is meaningfully constrained by its attack vector, not a drop-everything priority. The CVSS 4.0 vector (AV:A/AC:L/AT:P/PR:N/UI:N) confirms the attacker needs adjacent-network access (same Wi-Fi/Bluetooth/Wi-Fi Direct proximity) rather than remote internet reach, and the AT:P metric indicates a specific attack requirement must be met, which lowers automatability and mass-exploitation potential. On the impact side the vector claims high confidentiality (VC:H) with only low integrity/availability (VI:L/VA:L), consistent with the description's focus on accessing sensitive information. No EPSS score, no CISA KEV listing, and no public POC were provided in the intelligence, so there is no public exploit identified at time of analysis and no evidence of active exploitation - signals all point to a vendor-discovered, self-reported issue (reporter mobile.security@samsung.com) rather than an in-the-wild threat. One discrepancy to verify: the vendor vector asserts low integrity and availability impact, but the description mentions only information access (confidentiality), so the I/A impact ratings are not substantiated by the prose and should be confirmed with Samsung's bulletin. Net: patch in normal cycles; the adjacency requirement and absence of exploitation signals make this a managed-risk item rather than an emergency. |
| Exploit ScenarioDerived | An attacker within Bluetooth, Wi-Fi Direct, or shared local-network range of a victim running Samsung Flow abuses the improper authentication in the device pairing/connection handshake to impersonate or interpose on the trusted link between the phone and its paired PC or tablet. Having defeated the authentication check, the attacker reads sensitive data (such as notifications, clipboard, or transferred content) flowing over the Samsung Flow channel. No public exploit code was identified in the provided intelligence, and exploitation requires physical/network proximity to the target. |
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Alert meAnalysisAIv1 – Oct 12, 2026
Samsung Flow builds prior to 4.9.22.4 contain an improper authentication weakness that lets an attacker on an adjacent wireless network reach sensitive information exchanged or stored by the app. Exploitation is unauthenticated and requires no user interaction (CVSS 4.0 PR:N/UI:N), but the vector also requires a specific precondition (AT:P) and proximity, so a successful attempt depends on timing or an active pairing/connection state rather than being reliably repeatable on demand. Severity is moderate (6.1 base) and no public exploit code or confirmed active exploitation was identified at time of analysis; realistic risk is constrained by the adjacent-network vector and the conditional attack requirement.
RemediationAI
The primary fix is to upgrade Samsung Flow to version 4.9.22.4 or later on every paired device, using the vendor's release notes and the advisory at https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=10 to confirm availability per platform; because the link is two-sided, patch both the phone and the PC/tablet peer to fully close the channel. Where immediate upgrade is not possible, reduce exposure by disabling or signing out of Samsung Flow on devices that are regularly used in public or untrusted physical spaces, and turn off Bluetooth and Wi-Fi Direct when cross-device continuity is not needed - this defeats the AV:A vector but sacrifices the notification sync, handoff, and biometric-unlock features users rely on, and disabling Bluetooth may affect headsets, wearables, and peripherals. Enterprise environments can additionally restrict installation of Samsung Flow on managed corporate endpoints and keep paired personal devices off sensitive networks, accepting that this breaks the intended phone-to-PC workflow. There is no vendor-released patch alternative or version-independent workaround documented beyond upgrading to 4.9.22.4; the absence of a lower-impact configuration toggle means version upgrade remains the only complete remediation.
Affected VersionsENISA
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Technical ContextAI · show details
Samsung Flow is Samsung's cross-device continuity service that links a Galaxy phone with a paired Windows PC or tablet over Bluetooth and Wi-Fi Direct to synchronize notifications, enable biometric unlock, and hand off content. The flaw is an authentication defect (CWE-287 class, mapped per the advisory as improper authentication) in the app's peer/connection handling: the service does not adequately verify the identity or authenticity of the adjacent party before granting access to sensitive data, allowing a co-located attacker who is on the same Bluetooth/Wi-Fi Direct segment to obtain information the peer link was intended to protect. The CVSS 4.0 vector (AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L) and the independent assessment's CVSS 3.1 view (AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N) both agree the primary impact is high-confidentiality disclosure with no integrity or availability loss, that no credentials or user action are required (PR:N/UI:N), and that the attack is only reachable from an adjacent network. The AT:P / AC:H element reflects that exploitation hinges on a specific condition - most plausibly an in-progress pairing or active Flow session within radio range - which limits repeatability and makes the flaw far less exposed than a network-reachable issue of the same base score.
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Severity by source
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Adjacent proximity gives AV:A; the AT:P attack requirement maps to AC:H; no auth or interaction (PR:N/UI:N); description supports confidentiality only, so C:H with I:N/A:N.
Primary rating from Vendor (samsung).
CVSS VectorVendor: samsung
DescriptionCVE.org
Improper authentication in Samsung Flow prior to version 4.9.22.4 allows adjacent attackers to access sensitive information.
Threat Intelligence Overview
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
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EUVD-2026-97198
GHSA-fm28-q8cf-g8mm
NVD
CVE.org
EPSS
Exploit-DB