CVE-2026-86723Public exploitNetwork attack vector

PGP second-factor bypass via loose comparison

Published Sep 8, 2026 · Updated Sep 8, 2026

Improper authentication in WWBN AVideo 29.0 allows remote authenticated users to bypass PGP two-factor authentication. LoginControl::verifyChallenge() loosely compares an omitted response with an unset session challenge, treats NULL as equal to NULL, and marks the challenge complete. Exploitation requires LoginControl PGP authentication, a stored PGP key, and the account password; it grants the account a fully authenticated session without the private key.

CVSS severity8.6
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in WWBN AVideo 29.0 allows remote authenticated users to bypass PGP two-factor authentication. LoginControl::verifyChallenge() loosely compares an omitted response with an unset session challenge, treats NULL as equal to NULL, and marks the challenge complete. Exploitation requires LoginControl PGP authentication, a stored PGP key, and the account password; it grants the account a fully authenticated session without the private key.

The record

CVE
CVE-2026-86723
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
WWBN
Product
AVideo
Classifications
CWE-287, CWE-697, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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 <=c3edcc274c389816d434acadac07ee78eaf330c1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WWBN · AVideoversion=0 <=c3edcc274c389816d434acadac07ee78eaf330c1

Published CVSS scores

8.1VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8.6VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-697Incorrect Comparison
T1078Valid Accounts

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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