CVE-2021-35533

🗓️ 26 Nov 2021 16:37:27Reported by Hitachi EnergyType

Improper Input Validation vulnerability in the APDU parser in the Bidirectional Communication Interface (BCI) IEC 60870-5-104 function of Hitachi Energy RTU500 series allows an attacker to cause the receiving RTU500 CMU to reboot

Reporter	Title	Published	Views	Family All 10
Circl	CVE-2021-35533	26 Nov 202120:29	–	circl
CNNVD	Hitachi Energy Relion 输入验证错误漏洞	26 Nov 202100:00	–	cnnvd
Cvelist	CVE-2021-35533 Specially Crafted IEC 60870-5-104 Packet Vulnerability in RTU500 series	26 Nov 202116:37	–	cvelist
EUVD	EUVD-2021-22169	7 Oct 202500:30	–	euvd
ICS	Hitachi Energy RTU500 series BCI	2 Dec 202100:00	–	ics
NVD	CVE-2021-35533	26 Nov 202117:15	–	nvd
OSV	CVE-2021-35533	26 Nov 202117:15	–	osv
Prion	Input validation	26 Nov 202117:15	–	prion
Positive Technologies	PT-2021-20956 · Hitachi Energy · Rtu500 Series Cmu Firmware	26 Nov 202100:00	–	ptsecurity
Tenable Nessus	Hitachi Energy RTU500 series BCI Improper Input Validation (CVE-2021-35533)	29 Mar 202300:00	–	nessus

NVD

Node

hitachienergy rtu500_firmwareMatch12.0

hitachienergy rtu500_firmwareMatch12.2

hitachienergy rtu500_firmwareMatch12.4

AND

hitachienergy rtu500Match-

[
  {
    "product": "RTU500 series",
    "vendor": "Hitachi Energy",
    "versions": [
      {
        "lessThanOrEqual": "12.0.*",
        "status": "affected",
        "version": "CMU Firmware version 12.0",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "12.2.*",
        "status": "affected",
        "version": "CMU Firmware version 12.2",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "12.4.*",
        "status": "affected",
        "version": "CMU Firmware version 12.4",
        "versionType": "custom"
      }
    ]
  }
]

Source	Link
search	www.search.abb.com/library/Download.aspx

17 Jun 2026 03:57Current

7.4High risk

Vulners AI Score7.4

CVSS 27.1

CVSS 3.17.5

EPSS0.0092

CWE-20