CVE-2026-1773 (GCVE-0-2026-1773)

Vulnerability from cvelistv5 – Published: 2026-02-24 13:13 – Updated: 2026-02-24 13:40
VLAI?
Summary
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.
Severity ?
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-184 - Incomplete List of Disallowed Inputs
Assigner
References
Impacted products
Vendor Product Version
Hitachi Energy RTU500 series CMU firmware Affected: 12.7.1 , ≤ 12.7.7 (custom)
Affected: 13.5.1 , ≤ 13.5.4 (custom)
Affected: 13.6.1 , ≤ 13.6.2 (custom)
Affected: 13.7.1 , ≤ 13.7.7 (custom)
Affected: 13.8.1 (custom)
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            "Recovery": "NOT_DEFINED",
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    "datePublished": "2026-02-24T13:13:17.990Z",
    "dateReserved": "2026-02-02T16:28:59.394Z",
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.