CVE-2025-62003Network attack vector

Authenticated detection bypass via delayed MFA check

Published Dec 18, 2025 · Updated Dec 18, 2025

Authentication bypass in BullWall Server Intrusion Protection allows remote authenticated users to evade RDP session detection. The RDP connection workflow performs the MFA check only after a configuration-dependent delay, creating a TOCTOU interval in which monitoring has not completed. A valid low-privilege account and precise timing are required; the published record does not identify the affected configuration, delay duration, or underlying code path.

CVSS severity7.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in BullWall Server Intrusion Protection allows remote authenticated users to evade RDP session detection. The RDP connection workflow performs the MFA check only after a configuration-dependent delay, creating a TOCTOU interval in which monitoring has not completed. A valid low-privilege account and precise timing are required; the published record does not identify the affected configuration, delay duration, or underlying code path.

The record

CVE
CVE-2025-62003
Published
Dec 18, 2025
Updated
Dec 18, 2025
Vendor
BullWall
Product
Server Intrusion Protection
Classifications
CWE-367, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 2025Record 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=4.6.0.0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

BullWall · Server Intrusion Protectionversion=4.6.0.0 <*

Published CVSS scores

7.5Cybersecurity and Infrastructure Security AgencyCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7Cybersecurity and Infrastructure Security AgencyCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1078Valid Accounts

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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