CVE-2025-47981CWE-122

SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability

Critical · published July 8, 2025

CVSS v3.1
9.8
EPSS
41%
Percentile
98.7
In the wild
Unconfirmed
What it is

🚨 A heap-based buffer overflow in Windows SPNEGO Extended Negotiation lets unauthorized attackers run code over the network—like giving a stranger a master key to your office! 🔥 Think of it this way: it's like having a delivery person who just walks into the building without checking in — no badge, no ID — and starts grabbing anything they want! This vulnerability opens the door for malicious code to infiltrate your system without a hitch. If exploited, an attacker could seize control over your network, potentially executing any code they desire. This means they could access sensitive data, modify files, and create a complete security nightmare for your organization. Imagine the chaos of a stranger running wild in your digital workspace!

Put simply

Think of it this way: it's like having a delivery person who just walks into the building without checking in — no badge, no ID — and starts grabbing anything they want! This vulnerability opens the door for malicious code to infiltrate your system without a hitch. This vulnerability allows unauthorized attackers to exploit a heap-based buffer overflow in Windows SPNEGO Extended Negotiation, enabling them to execute arbitrary code over the network without needing authentication.

What to do

If exploited, an attacker could seize control over your network, potentially executing any code they desire. This means they could access sensitive data, modify files, and create a complete security nightmare for your organization. Imagine the chaos of a stranger running wild in your digital workspace! To protect yourself, apply the latest security updates from Microsoft immediately. Review system configurations to ensure proper security measures are in place and consider enabling additional network protections to mitigate potential exploitation. Regularly audit your systems to catch any suspicious activity. You've got this! Follow these steps, and you'll tighten your defenses faster than a superhero can don their cape! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.41120 · 98.7th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2025-07-08T16:57Z
EPSS history
Timeline
  • 08 JUL 16:57Z
    SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability
    cvelistv5