CVE-2026-1773CWE-184

IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame

High · published February 24, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
38.6
In the wild
Unconfirmed
What it is

IEC 60870-5-104 used in RTU500: 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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
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
EPSS
0.00457 · 38.6th percentile
Weakness
CWE-184 · Incomplete List of Disallowed Inputs
Published
2026-02-24T13:13Z
EPSS history
Timeline
  • 24 FEB 13:13Z
    IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame
    cvelistv5