EUVD-2026-82789
GHSA-mr9f-32f3-48r2
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Network-reachable XSS requiring an authenticated account (PR:L) and victim launching the player (UI:R); script crosses into another user's context (S:C) with limited read/write impact (C:L/I:L), no availability effect.
Primary rating from Vendor (synology).
CVSS VectorVendor: synology
Lifecycle Timeline
2DescriptionCVE.org
An improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Video API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote authenticated users to read or write limited files when the player is launched.
AnalysisAI
Cross-site scripting in the Video API of Synology DiskStation Manager (DSM) allows a remote authenticated user to read or write a limited set of files in the context of a victim's browser session when the video player is launched. Affected builds are DSM before 7.2.1-69057-10, 7.2.2-72806-7, and 7.3.2-86009-2; exploitation requires a valid DSM account with Video API access plus victim interaction (launching the player), and impact is bounded to low-confidentiality and low-integrity file access rather than code execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a remote authenticated DSM user account (PR:L) with access to the Video API, plus victim user interaction: the malicious payload only triggers when the video player is launched (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a moderate, authenticated cross-site scripting flaw (CWE-79) in the Video API of Synology DSM, best treated as routine-priority patching rather than an emergency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade DSM to the fixed builds referenced in Synology advisory SA_26_06 - 7.2.1-69057-10, 7.2.2-72806-7, or 7.3.2-86009-2 (or later maintenance releases on the corresponding branch) - which neutralize the unsanitized input in the Video API; the advisory at https://www.synology.com/en-global/security/advisory/Synology_SA_26_06 is the authoritative source for exact build and model applicability and should be followed rather than relying on this summary. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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