{"id":"CVE-2021-22786","aliases":["EUVD-2021-9921","GHSA-c8j6-69w9-74h6"],"status":"published","title":"A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive...","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)","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00647,"percentile":0.51525,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2023-02-01T00:00:00Z","modified":"2026-06-17T03:37:46Z","products":[{"vendor":"schneider electric","product":"legacy modicon quantum"},{"vendor":"schneider electric","product":"modicon m340 cpu (part numbers bmxp34*)"},{"vendor":"schneider electric","product":"modicon m580 cpu (part numbers bmep* and bmeh*)"},{"vendor":"schneider electric","product":"modicon m580 cpu safety (part numbers bmep58*s and bmeh58*s)"},{"vendor":"schneider electric","product":"modicon mc80 (bmkc80)"},{"vendor":"schneider electric","product":"modicon momentum cpu (171cbu*)"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp341000_firmware"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp342000_firmware"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp3420102_firmware"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp342010_firmware"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp342020_firmware"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp342020h_firmware"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp3420302_firmware"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp3420302h_firmware"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp342030_firmware"},{"vendor":"schneider-electric","product":"modicon_m340_bmxp342030h_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmeh582040_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmeh582040c_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmeh582040s_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmeh584040_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmeh584040c_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmeh584040s_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmeh586040_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmeh586040c_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmeh586040s_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep581020_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep581020h_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep582020_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep582020h_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep582040_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep582040h_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep582040s_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep583020_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep583040_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep584020_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep584040_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep584040s_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep585040_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep585040c_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep586040_firmware"},{"vendor":"schneider-electric","product":"modicon_m580_bmep586040c_firmware"},{"vendor":"schneider-electric","product":"modicon_mc80_bmkc8020301_firmware"},{"vendor":"schneider-electric","product":"modicon_mc80_bmkc8020310_firmware"},{"vendor":"schneider-electric","product":"modicon_mc80_bmkc8030311_firmware"},{"vendor":"schneider-electric","product":"modicon_momentum_171cbu78090_firmware"},{"vendor":"schneider-electric","product":"modicon_momentum_171cbu98090_firmware"},{"vendor":"schneider-electric","product":"modicon_momentum_171cbu98091_firmware"}],"references":[{"url":"https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-221-04\u0026p_enDocType=Security+and+Safety+Notice\u0026p_File_Name=SEVD-2022-221-04-Modicon_Controllers_Ethernet_Modules_Security_Notification.pdf","tags":["x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22786"},{"url":"https://github.com/advisories/GHSA-c8j6-69w9-74h6"}],"sources":{"cve":[{"id":"CVE-2021-22786","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)","status":"published","published":"2023-02-01T00:00:00Z","modified":"2025-02-05T20:06:44.28Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:32:57.701381Z"}],"euvd":[{"id":"EUVD-2021-9921","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)","status":"published","published":"2023-02-01T00:00:00Z","modified":"2025-02-05T20:06:44Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-03T00:04:04.235223Z"}],"ghsa":[{"id":"GHSA-c8j6-69w9-74h6","title":"A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive...","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)","status":"published","published":"2023-02-01T06:30:30Z","modified":"2023-02-16T05:06:35Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:54:08.612342Z"}],"nvd":[{"id":"CVE-2021-22786","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)","status":"published","published":"2023-02-01T04:15:08.603Z","modified":"2026-06-17T03:37:46.493Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:07:07.323379Z"}]}}