{"id":"CVE-2026-46676","aliases":[],"cve":{"records":[{"id":"CVE-2026-46676","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-05-15T21:46:51.547Z","published":"2026-11-12T20:00:58.571Z","modified":"2026-11-12T20:00:58.571Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-11-12T20:00:58.571Z"}],"references":[{"url":"https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-2fwp-32cj-g3x4","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/bacnet-stack/bacnet-stack/pull/1344","tags":["x_refsource_MISC"],"source":"GitHub_M"}],"weaknesses":[{"id":"CWE-457","description":"CWE-457: Use of Uninitialized Variable","source":"GitHub_M"}],"applicability":[],"prioritization":[]},"title":"BACnet Stack: Uninitialized Value Use in AtomicReadFile-ACK Record-Access Encoder Causes Response Corruption and Conditional Information Disclosure","titleSource":"GitHub_M","descriptionSource":"GitHub_M","description":"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1.5.1.","score":5.3,"severity":"medium","published":"2026-11-12T20:00:58.571Z","modified":"2026-11-12T20:00:58.571Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"bacnet-stack","name":"bacnet-stack","platforms":[],"versions":[{"version":">= 1.4.0, < 1.4.4","status":"affected"},{"version":">= 1.5.0, < 1.5.1","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-46676"}],"remediation":[],"references":["https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-2fwp-32cj-g3x4","https://github.com/bacnet-stack/bacnet-stack/pull/1344"],"sources":[{"name":"CVE","id":"CVE-2026-46676","modified":"2026-11-12T20:00:58.571Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-46676"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3}],"sourceAffected":[],"observedAt":"2026-11-13T09:46:22.513Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T01:55:30.737Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-13T10:05:33.459Z","attemptedAt":"2026-11-13T10:05:33.459Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-13T10:05:33.459Z","attemptedAt":"2026-11-13T10:05:33.459Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-13T10:05:33.459Z","attemptedAt":"2026-11-13T10:05:33.459Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-13T10:05:33.459Z","attemptedAt":"2026-11-13T10:05:33.459Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-124659","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-124659","modified":"Nov 12, 2026, 8:00:58 PM","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","checkedAt":"2026-11-13T10:05:33.459Z"},{"source":"NVD","id":"CVE-2026-46676","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46676","modified":"2026-11-12T22:09:39.233","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","checkedAt":"2026-11-13T10:05:33.459Z"}],"aiSummary":{"text":"BACnet Stack versions 1.4.0 to 1.4.3 and 1.5.0 are vulnerable to an uninitialized value use weakness, allowing unauthenticated remote attackers to corrupt network responses. The issue is in the AtomicReadFile record-access ACK encoder. This may cause information disclosure.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-13T09:51:07.436Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-46676"}]}}