{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46676","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-15T21:46:51.547Z","datePublished":"2026-11-12T20:00:58.571Z","dateUpdated":"2026-11-12T20:00:58.571Z"},"containers":{"cna":{"title":"BACnet Stack: Uninitialized Value Use in AtomicReadFile-ACK Record-Access Encoder Causes Response Corruption and Conditional Information Disclosure","problemTypes":[{"descriptions":[{"cweId":"CWE-457","lang":"en","description":"CWE-457: Use of Uninitialized Variable","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-2fwp-32cj-g3x4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-2fwp-32cj-g3x4"},{"name":"https://github.com/bacnet-stack/bacnet-stack/pull/1344","tags":["x_refsource_MISC"],"url":"https://github.com/bacnet-stack/bacnet-stack/pull/1344"}],"affected":[{"vendor":"bacnet-stack","product":"bacnet-stack","versions":[{"version":">= 1.4.0, < 1.4.4","status":"affected"},{"version":">= 1.5.0, < 1.5.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-12T20:00:58.571Z"},"descriptions":[{"lang":"en","value":"BACnet Stack is a BACnet open source protocol stack C library for embedded systems. From versions 1.4.0 to before 1.4.4, and 1.5.0 to before 1.5.1, an uninitialized value use vulnerability in bacnet-stack's AtomicReadFile record-access ACK encoder allows unauthenticated remote attackers to corrupt the encoded OCTET STRING length and payload boundary in network responses by sending a crafted AtomicReadFile request that reaches a successful record-access path. This issue has been patched in versions 1.4.4 and 1.5.1."}],"source":{"advisory":"GHSA-2fwp-32cj-g3x4","discovery":"UNKNOWN"}}}}