CVE-2026-83526Network attack vector

Authenticated code execution via pre-validation file write race

Published Oct 10, 2026 · Updated Oct 10, 2026

File upload in FolioVision FV Player 8.1.7 and earlier allows remote authenticated users to write executable files via video URLs. The check_mimetype() function saves remote content in public uploads before checking MIME type or extension, while new player creation lacks a capability check. Subscriber-level access suffices; code execution requires winning a race and an uploaded file that the server executes.

CVSS severity8.8
High
EPSS probability0.64%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File upload in FolioVision FV Player 8.1.7 and earlier allows remote authenticated users to write executable files via video URLs. The check_mimetype() function saves remote content in public uploads before checking MIME type or extension, while new player creation lacks a capability check. Subscriber-level access suffices; code execution requires winning a race and an uploaded file that the server executes.

The record

CVE
CVE-2026-83526
Published
Oct 10, 2026
Updated
Oct 10, 2026
Vendor
FolioVision
Product
FV Player
Classifications
T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=8.1.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FolioVision · FV Playerversion=0 <=8.1.7

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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