CVE-2026-81678Network attack vectorHinoki check available

Unauthenticated SSRF via IPv6 transition addresses

Published Aug 27, 2026 · Updated Aug 27, 2026

Server-side request forgery in WWBN AVideo before 24.0 allows remote attackers to reach internal services through the LiveLinks proxy. The isSSRFSafeURL function validates an IPv6 literal without extracting and rechecking the private IPv4 address embedded in NAT64, 6to4, or Teredo form. The proxy endpoint requires no authentication; a crafted URL can make the server request internal applications or cloud metadata, exposing response data.

CVSS severity6.9
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Server-side request forgery in WWBN AVideo before 24.0 allows remote attackers to reach internal services through the LiveLinks proxy. The isSSRFSafeURL function validates an IPv6 literal without extracting and rechecking the private IPv4 address embedded in NAT64, 6to4, or Teredo form. The proxy endpoint requires no authentication; a crafted URL can make the server request internal applications or cloud metadata, exposing response data.

The record

CVE
CVE-2026-81678
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
WWBN
Product
AVideo
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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 <24.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WWBN · AVideoversion=0 <24.0

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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