{"cve":"CVE-2023-5768","nvd":{"published":"2023-12-04T15:15:07.793","modified":"2026-06-17T06:49:19.860","status":"Modified","description":"A vulnerability exists in the HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. \nIncomplete or wrong received APDU frame layout may \ncause blocking on link layer. Error reason was an endless blocking when reading incoming frames on link layer \nwith wrong length information of APDU or delayed reception \nof data octets.\n\n\nOnly communication link of affected HCI IEC 60870-5-104 \nis blocked. If attack sequence stops the communication to \nthe previously attacked link gets normal again.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://publisher.hitachienergy.com/preview?DocumentId=8DBD000176&languageCode=en&Preview=true","https://publisher.hitachienergy.com/preview?DocumentId=8DBD000176&languageCode=en&Preview=true"],"products":["hitachienergy:rtu520_firmware","hitachienergy:rtu530_firmware","hitachienergy:rtu540_firmware","hitachienergy:rtu560_firmware"],"source":"nvd","synced_at":"2026-10-19T21:42:34.585441961+00:00"},"epss":{"cve":"CVE-2023-5768","score":0.00412,"percentile":0.35466,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}