{"id":"CVE-2026-49035","state":"PUBLISHED","title":"Stack-based Buffer Overflow in MZ Automation libIEC61850","description":"The affected product is vulnerable to a heap-based buffer overflow via a crafted MMS Initiate request. Remote code execution (RCE) has been demonstrated when ASLR is disabled; memory corruption or denial of service may occur in configurations where ASLR is enabled.","publishedAt":"2026-07-23T20:48:18.888Z","updatedAt":"2026-07-24T13:42:05.960Z","severity":{"score":9.2,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"icscert"},"assigner":"icscert","products":["MZ Automation libIEC61850"],"affected":[{"vendor":"MZ Automation","product":"libIEC61850","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThanOrEqual":"1.6.1","versionType":"custom"}]}],"references":["https://www.cisa.gov/news-events/ics-advisories/icsa-26-204-06"],"weaknesses":["CWE-122"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49035.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49035","state":"PUBLISHED","datePublished":"2026-07-23T20:48:18.888Z","dateUpdated":"2026-07-24T13:42:05.960Z","assignerShortName":"icscert","assignerOrgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateReserved":"2026-06-09T20:01:29.554Z"},"containers":{"cna":{"title":"Stack-based Buffer Overflow in MZ Automation libIEC61850","descriptions":[{"lang":"en","value":"The affected product is vulnerable to a heap-based buffer overflow via a crafted MMS Initiate request. Remote code execution (RCE) has been demonstrated when ASLR is disabled; memory corruption or denial of service may occur in configurations where ASLR is enabled."}],"affected":[{"vendor":"MZ Automation","product":"libIEC61850","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThanOrEqual":"1.6.1","versionType":"custom"}]}],"references":[{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-204-06","tags":["government-resource"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":8.1,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"CRITICAL","baseScore":9.2,"vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","lang":"en","description":"CWE-122 Heap-based buffer overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"icscert","orgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateUpdated":"2026-07-23T20:48:18.888Z"},"solutions":[{"lang":"en","value":"MZ Automation recommends updating to the latest build of the libIEC61850 standard. Documentation can be found at https://github.com/mz-automation/libiec61850.\n https://github.com/mz-automation/libiec61850","supportingMedia":[{"type":"text/html","base64":false,"value":"MZ Automation recommends updating to the latest build of the libIEC61850 standard. Documentation can be found at https://github.com/mz-automation/libiec61850.<br><a href=\"https://github.com/mz-automation/libiec61850\">https://github.com/mz-automation/libiec61850</a>"}]}],"credits":[{"lang":"en","value":"Abhinav Agarwal reported this vulnerability to CISA","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-24T13:41:55.157198Z","id":"CVE-2026-49035","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-24T13:42:05.960Z"}}]}}}