AI Sec Watch: A Security Intelligence Platform for AI Systems

Luu, T.J.

🔥 This vulnerability is being actively exploited in the wild (CISA Known Exploited Vulnerabilities catalog)

CVE-2026-21525: Microsoft Windows NULL Pointer Dereference Vulnerability

infovulnerability🔥 Actively Exploited

security

Source: CISA Known Exploited VulnerabilitiesFebruary 9, 2026CVE-2026-21525

Summary

Microsoft Windows Remote Access Connection Manager has a NULL pointer dereference (a bug where the software tries to use a memory location that doesn't exist), which allows an attacker to crash the service and prevent it from working. This vulnerability is currently being exploited by attackers in real-world attacks.

Solution / Mitigation

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Vulnerability Details

EPSS (30-day exploit probability)

EPSS: 3.4%

Exploit Maturity

🔥 Actively Exploited

Classification

Attack SophisticationModerate

Taxonomy References

CWE (Weakness Type)

CWE-476

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-21525

First tracked: February 12, 2026 at 02:20 PM

Classified by LLM (prompt v3) · confidence: 95%