A HIGH-severity vulnerability identified as CVE-2026-20423 has been published on March 2, 2026 with a CVSS base score of 7.1. This security advisory provides a detailed breakdown of the vulnerability, its potential impact, weakness classification, and actionable steps to protect your systems.
Vulnerability Details
CVE ID: CVE-2026-20423
Severity: HIGH
CVSS Score: 7.1
Published: March 2, 2026
Weakness (CWE): CWE-749
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Confidentiality Impact | None |
| Integrity Impact | High |
| Availability Impact | High |
Technical Description
In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956.
Potential Impact
If exploited, this high-severity vulnerability could allow an attacker to tamper with system integrity, cause a denial of service. Organizations running affected software should treat this as a priority remediation item.
Recommended Action
No official patch is available yet. Until one is released:
- Monitor the official NVD page and vendor channels for patch announcements.
- Restrict access to the affected system or service where possible.
- Apply network-level mitigations such as firewall rules or WAF policies.
- Enable logging and alerting for anomalous activity related to this vulnerability.
- Review your incident response plan in case of active exploitation.
References
Related Security Advisories
- [HIGH] CVE-2025-13673 — CVSS 7.5 (February 28, 2026) — HIGH / CVSS 7.5
- [HIGH] CVE-2026-3169 — CVSS 8.8 (February 25, 2026) — HIGH / CVSS 8.8
- [HIGH] CVE-2025-40540 — CVSS 7.2 (February 24, 2026) — HIGH / CVSS 7.2
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