CVE-2025-62003CWE-367

BullWall Server Intrusion Protection RDP MFA connection delay

High · published December 18, 2025

CVSS v4.0
7.7
EPSS
0%
Percentile
26.0
In the wild
Unconfirmed
What it is

⚡ There's a sneaky delay in BullWall’s MFA check for RDP connections that could let attackers slip right by unnoticed! Think of it as a bouncer at a club who takes their sweet time checking IDs — if an unauthorized guest can waltz in while the bouncer is distracted, chaos can ensue inside! In this case, a remote, authenticated attacker could exploit this lag to bypass the MFA check altogether, gaining access to systems that should be tightly secured. This could lead to unauthorized actions, data breaches, or even complete control over the compromised environment — absolutely devastating!

Put simply

Think of it as a bouncer at a club who takes their sweet time checking IDs — if an unauthorized guest can waltz in while the bouncer is distracted, chaos can ensue inside! This vulnerability stems from a configuration-dependent delay before the multi-factor authentication (MFA) check for Remote Desktop Protocol (RDP) connections, allowing attackers to exploit this window to gain access without triggering alerts.

What to do

In this case, a remote, authenticated attacker could exploit this lag to bypass the MFA check altogether, gaining access to systems that should be tightly secured. This could lead to unauthorized actions, data breaches, or even complete control over the compromised environment — absolutely devastating! To safeguard your environment, ensure you update to versions that are not impacted by this vulnerability. Review your configuration settings and consider implementing additional monitoring to detect any unusual access attempts. It’s crucial to enhance your security posture as soon as possible! You've got this! Stay vigilant and proactive, and you’ll keep your systems secure! 🛡️

The record
Technical detail
CVSS v4.0
7.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00338 · 26.0th percentile
Weakness
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition
Published
2025-12-18T20:35Z
EPSS history
Timeline
  • 18 DEC 20:35Z
    BullWall Server Intrusion Protection RDP MFA connection delay
    cvelistv5