{"cve":"CVE-2023-28766","nvd":{"published":"2023-04-11T10:15:18.337","modified":"2026-06-17T05:48:43.330","status":"Modified","description":"A vulnerability has been identified in SIPROTEC 5 6MD85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 6MD86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 6MD89 (CP300) (All versions >= V7.80 < V9.64), SIPROTEC 5 6MU85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7KE85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SA82 (CP100) (All versions < V8.90), SIPROTEC 5 7SA82 (CP150) (All versions < V9.40), SIPROTEC 5 7SA86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SA87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SD82 (CP100) (All versions < V8.90), SIPROTEC 5 7SD82 (CP150) (All versions < V9.40), SIPROTEC 5 7SD86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SD87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SJ81 (CP100) (All versions < V8.89), SIPROTEC 5 7SJ81 (CP150) (All versions < V9.40), SIPROTEC 5 7SJ82 (CP100) (All versions < V8.89), SIPROTEC 5 7SJ82 (CP150) (All versions < V9.40), SIPROTEC 5 7SJ85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SJ86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SK82 (CP100) (All versions < V8.89), SIPROTEC 5 7SK82 (CP150) (All versions < V9.40), SIPROTEC 5 7SK85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SL82 (CP100) (All versions < V8.90), SIPROTEC 5 7SL82 (CP150) (All versions < V9.40), SIPROTEC 5 7SL86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SL87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SS85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7ST85 (CP300) (All versions >= V7.80 < V9.64), SIPROTEC 5 7ST86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7SX82 (CP150) (All versions < V9.40), SIPROTEC 5 7SX85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7UM85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7UT82 (CP100) (All versions < V8.90), SIPROTEC 5 7UT82 (CP150) (All versions < V9.40), SIPROTEC 5 7UT85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7UT86 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7UT87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7VE85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7VK87 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 7VU85 (CP300) (All versions >= V7.80 < V9.40), SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.1) (All versions < V9.40 installed on CP150 and CP300 devices), SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.1) (All versions < V8.89 installed on CP100 devices), SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 1) (All versions < V9.40 installed on CP150 and CP300 devices), SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 1) (All versions < V8.89 installed on CP100 devices), SIPROTEC 5 Communication Module ETH-BD-2FO (All versions < V9.40), SIPROTEC 5 Compact 7SX800 (CP050) (All versions < V9.40). Affected devices lack proper validation of http request parameters of the hosted web service.\r\nAn unauthenticated remote attacker could send specially crafted packets that could cause denial of service condition of the target device.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-476"],"references":["https://cert-portal.siemens.com/productcert/html/ssa-322980.html","https://cert-portal.siemens.com/productcert/pdf/ssa-322980.pdf","https://cert-portal.siemens.com/productcert/html/ssa-322980.html","https://cert-portal.siemens.com/productcert/pdf/ssa-322980.pdf"],"products":["siemens:siprotec_5_6md85_firmware","siemens:siprotec_5_6md86_firmware","siemens:siprotec_5_6md89_firmware","siemens:siprotec_5_6mu85_firmware","siemens:siprotec_5_7ke85_firmware","siemens:siprotec_5_7sa82_firmware","siemens:siprotec_5_7sa84_firmware","siemens:siprotec_5_7sa86_firmware","siemens:siprotec_5_7sa87_firmware","siemens:siprotec_5_7sd82_firmware","siemens:siprotec_5_7sd84_firmware","siemens:siprotec_5_7sd86_firmware","siemens:siprotec_5_7sd87_firmware","siemens:siprotec_5_7sj81_firmware","siemens:siprotec_5_7sj82_firmware","siemens:siprotec_5_7sj85_firmware","siemens:siprotec_5_7sj86_firmware","siemens:siprotec_5_7sk82_firmware","siemens:siprotec_5_7sk85_firmware","siemens:siprotec_5_7sl82_firmware","siemens:siprotec_5_7sl86_firmware","siemens:siprotec_5_7sl87_firmware","siemens:siprotec_5_7ss85_firmware","siemens:siprotec_5_7st85_firmware","siemens:siprotec_5_7st86_firmware","siemens:siprotec_5_7sx82_firmware","siemens:siprotec_5_7sx85_firmware","siemens:siprotec_5_7um85_firmware","siemens:siprotec_5_7ut82_firmware","siemens:siprotec_5_7ut85_firmware","siemens:siprotec_5_7ut86_firmware","siemens:siprotec_5_7ut87_firmware","siemens:siprotec_5_7ve85_firmware","siemens:siprotec_5_7vk87_firmware","siemens:siprotec_5_7vu85_firmware","siemens:siprotec_5_communication_module_ethba2el_firmware","siemens:siprotec_5_communication_module_ethbb2fo_firmware","siemens:siprotec_5_communication_module_ethbd2fo_firmware","siemens:siprotec_5_compact_7sx800_firmware"],"source":"nvd","synced_at":"2026-10-19T21:38:05.473481323+00:00"},"epss":{"cve":"CVE-2023-28766","score":0.00935,"percentile":0.60786,"date":"2026-11-01"},"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."]}