CVE-2026-84476Public exploitNetwork attack vectorHinoki check available

Unlimited credential guessing via spoofed proxy headers

Published Sep 1, 2026 · Updated Sep 2, 2026

Authentication bypass in WWBN AVideo 29.0 and earlier allows remote attackers to defeat login rate limiting via spoofed proxy headers. getRealIpAddr() accepts the first valid X-Real-IP or X-Forwarded-For address whenever REMOTE_ADDR appears private, and enforceRateLimit() uses that value as its counter key. The flaw is reachable when PHP sees a private or loopback peer, including containerized and reverse-proxy deployments, and rotating the header enables unlimited login guesses from one host.

CVSS severity8.7
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in WWBN AVideo 29.0 and earlier allows remote attackers to defeat login rate limiting via spoofed proxy headers. getRealIpAddr() accepts the first valid X-Real-IP or X-Forwarded-For address whenever REMOTE_ADDR appears private, and enforceRateLimit() uses that value as its counter key. The flaw is reachable when PHP sees a private or loopback peer, including containerized and reverse-proxy deployments, and rotating the header enables unlimited login guesses from one host.

The record

CVE
CVE-2026-84476
Published
Sep 1, 2026
Updated
Sep 2, 2026
Vendor
WWBN
Product
AVideo
Classifications
CWE-290, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 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 <=29.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WWBN · AVideoversion=0 <=29.0

Published CVSS scores

7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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 exploitPublished

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1110.001Password Guessing

Public exploit references

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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