CVE-2026-86189
Unauthenticated path traversal in WWBN AVideo allows arbitrary file writes.
Is CVE-2026-86189 being exploited?
Not confirmed. CVE-2026-86189 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.41% probability of exploitation in the next 30 days.
How severe is CVE-2026-86189?
CVE-2026-86189 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-86189?
Yes. A fix has been recorded for CVE-2026-86189. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-86189 affect?
CVE-2026-86189 affects WWBN AVideo, notify.ffmpeg.json.php, avideoRelativePath parameter. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-86189?
Apply vendor patch immediately; restrict access and audit webroot.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attackers can write files to app root/subdirs (via avideoRelativePath), enabling webshell upload and remote code execution by replaying notifyCode token.
Immediate action required
- affected<= 29.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.