CVE-2026-1773

HIGH
2026-02-24 [email protected]
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 24, 2026 - 14:16 nvd
HIGH 7.5

Tags

Denial Of Service Rtu540 Firmware Rtu530 Firmware Rtu560 Firmware Rtu520 Firmware

Description

IEC 60870-5-104: Potential Denial of Service impact on reception of invalid U-format frame. Product is only affected if IEC 60870-5-104 bi-directional functionality is configured. Enabling secure communication following IEC 62351-3 does not remediate the vulnerability but mitigates the risk of exploitation.

Analysis

IEC 60870-5-104: Potential Denial of Service impact on reception of invalid U-format frame. Product is only affected if IEC 60870-5-104 bi-directional functionality is configured. …

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Remediation

Within 24 hours: Inventory all systems using IEC 60870-5-104 bi-directional functionality and assess network exposure. Within 7 days: Implement network segmentation to restrict IEC 60870-5-104 traffic to trusted sources only, and disable bi-directional functionality if operationally feasible. …

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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +38
POC: 0

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CVE-2026-1773 vulnerability details – vuln.today
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