A HIGH-severity vulnerability identified as CVE-2026-1876 has been published on March 3, 2026 with a CVSS base score of 8.7. 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-2026-1876
Severity: HIGH
CVSS Score: 8.7
Published: March 3, 2026
Weakness (CWE): CWE-404
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
Technical Description
Improper Resource Shutdown or Release vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP all versions allows a remote attacker to cause a denial-of-service (DoS) condition on the products by continuously sending UDP packets to the products. A system reset of the product is required for recovery.
Potential Impact
If exploited, this high-severity vulnerability could allow an attacker to cause significant damage to affected systems. 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-2026-20416 — CVSS 7.2 (March 2, 2026) — HIGH / CVSS 7.2
- [HIGH] CVE-2026-20423 — CVSS 7.1 (March 2, 2026) — HIGH / CVSS 7.1
- [HIGH] CVE-2025-13673 — CVSS 7.5 (February 28, 2026) — HIGH / CVSS 7.5
![[CRITICAL] CVE-2026-28773 — CVSS 9.3 (March 4, 2026)](https://atlas-cybersecurity.com/wp-content/plugins/elementor/assets/images/placeholder.png)
