CVE-2026-1773

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.
Configurations

Configuration 1 (hide)

AND
OR cpe:2.3:o:hitachienergy:rtu540_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu540_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu540_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu540_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu540_firmware:13.8.1:*:*:*:*:*:*:*
cpe:2.3:h:hitachienergy:rtu540:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND
OR cpe:2.3:o:hitachienergy:rtu560_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu560_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu560_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu560_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu560_firmware:13.8.1:*:*:*:*:*:*:*
cpe:2.3:h:hitachienergy:rtu560:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND
OR cpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu520_firmware:13.8.1:*:*:*:*:*:*:*
cpe:2.3:h:hitachienergy:rtu520:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND
OR cpe:2.3:o:hitachienergy:rtu530_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu530_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu530_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu530_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu530_firmware:13.8.1:*:*:*:*:*:*:*
cpe:2.3:h:hitachienergy:rtu530:-:*:*:*:*:*:*:*

History

27 Feb 2026, 18:56

Type Values Removed Values Added
CPE cpe:2.3:o:hitachienergy:rtu560_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu530_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:hitachienergy:rtu520:-:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu540_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu520_firmware:13.8.1:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu530_firmware:13.8.1:*:*:*:*:*:*:*
cpe:2.3:h:hitachienergy:rtu560:-:*:*:*:*:*:*:*
cpe:2.3:h:hitachienergy:rtu540:-:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu520_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu560_firmware:13.8.1:*:*:*:*:*:*:*
cpe:2.3:o:hitachienergy:rtu540_firmware:13.8.1:*:*:*:*:*:*:*
cpe:2.3:h:hitachienergy:rtu530:-:*:*:*:*:*:*:*
References () https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch - () https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch - Vendor Advisory
CVSS v2 : unknown
v3 : unknown
v2 : unknown
v3 : 7.5
First Time Hitachienergy rtu530 Firmware
Hitachienergy
Hitachienergy rtu560 Firmware
Hitachienergy rtu540
Hitachienergy rtu520 Firmware
Hitachienergy rtu560
Hitachienergy rtu540 Firmware
Hitachienergy rtu530
Hitachienergy rtu520

24 Feb 2026, 14:16

Type Values Removed Values Added
New CVE

Information

Published : 2026-02-24 14:16

Updated : 2026-02-27 18:56


NVD link : CVE-2026-1773

Mitre link : CVE-2026-1773

CVE.ORG link : CVE-2026-1773


JSON object : View

Products Affected

hitachienergy

  • rtu530_firmware
  • rtu560
  • rtu530
  • rtu520
  • rtu540
  • rtu520_firmware
  • rtu540_firmware
  • rtu560_firmware
CWE
CWE-184

Incomplete List of Disallowed Inputs