{"cve":"CVE-2021-22786","nvd":{"published":"2023-02-01T04:15:08.603","modified":"2026-06-17T03:37:46.493","status":"Modified","description":"A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the Modbus TCP protocol. Affected Products: Modicon M340 CPU (part numbers BMXP34*) (Versions prior to V3.30), Modicon M580 CPU (part numbers BMEP* and BMEH*) (Versions prior to SV3.20), Modicon MC80 (BMKC80) (Versions prior to V1.6), Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S) (All Versions), Modicon Momentum MDI (171CBU*) (Versions prior to V2.3), Legacy Modicon Quantum (All Versions)","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-200"],"references":["https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-221-04&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2022-221-04-Modicon_Controllers_Ethernet_Modules_Security_Notification.pdf","https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-221-04&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2022-221-04-Modicon_Controllers_Ethernet_Modules_Security_Notification.pdf"],"products":["schneider-electric:modicon_m340_bmxp341000_firmware","schneider-electric:modicon_m340_bmxp342000_firmware","schneider-electric:modicon_m340_bmxp3420102_firmware","schneider-electric:modicon_m340_bmxp342010_firmware","schneider-electric:modicon_m340_bmxp342020_firmware","schneider-electric:modicon_m340_bmxp342020h_firmware","schneider-electric:modicon_m340_bmxp3420302_firmware","schneider-electric:modicon_m340_bmxp3420302h_firmware","schneider-electric:modicon_m340_bmxp342030_firmware","schneider-electric:modicon_m340_bmxp342030h_firmware","schneider-electric:modicon_m580_bmeh582040_firmware","schneider-electric:modicon_m580_bmeh582040c_firmware","schneider-electric:modicon_m580_bmeh582040s_firmware","schneider-electric:modicon_m580_bmeh584040_firmware","schneider-electric:modicon_m580_bmeh584040c_firmware","schneider-electric:modicon_m580_bmeh584040s_firmware","schneider-electric:modicon_m580_bmeh586040_firmware","schneider-electric:modicon_m580_bmeh586040c_firmware","schneider-electric:modicon_m580_bmeh586040s_firmware","schneider-electric:modicon_m580_bmep581020_firmware","schneider-electric:modicon_m580_bmep581020h_firmware","schneider-electric:modicon_m580_bmep582020_firmware","schneider-electric:modicon_m580_bmep582020h_firmware","schneider-electric:modicon_m580_bmep582040_firmware","schneider-electric:modicon_m580_bmep582040h_firmware","schneider-electric:modicon_m580_bmep582040s_firmware","schneider-electric:modicon_m580_bmep583020_firmware","schneider-electric:modicon_m580_bmep583040_firmware","schneider-electric:modicon_m580_bmep584020_firmware","schneider-electric:modicon_m580_bmep584040_firmware","schneider-electric:modicon_m580_bmep584040s_firmware","schneider-electric:modicon_m580_bmep585040_firmware","schneider-electric:modicon_m580_bmep585040c_firmware","schneider-electric:modicon_m580_bmep586040_firmware","schneider-electric:modicon_m580_bmep586040c_firmware","schneider-electric:modicon_mc80_bmkc8020301_firmware","schneider-electric:modicon_mc80_bmkc8020310_firmware","schneider-electric:modicon_mc80_bmkc8030311_firmware","schneider-electric:modicon_momentum_171cbu78090_firmware","schneider-electric:modicon_momentum_171cbu98090_firmware","schneider-electric:modicon_momentum_171cbu98091_firmware"],"source":"nvd","synced_at":"2026-10-19T21:37:38.595364862+00:00"},"epss":{"cve":"CVE-2021-22786","score":0.0063,"percentile":0.50185,"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."]}