{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-19T21:57:15.045","vulnerabilities":[{"cve":{"id":"CVE-2026-26264","sourceIdentifier":"security-advisories@github.com","published":"2026-02-13T19:17:31.143","lastModified":"2026-06-17T10:26:00.427","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.5.0rc4 and 1.4.3rc2, a malformed WriteProperty request can trigger a length underflow in the BACnet stack, leading to an out‑of‑bounds read and a crash (DoS). The issue is in wp.c within wp_decode_service_request. When decoding the optional priority context tag, the code passes apdu_len - apdu_size to bacnet_unsigned_context_decode without validating that apdu_size <= apdu_len. If a truncated APDU reaches this path, apdu_len - apdu_size underflows, resulting in a large size being used for decoding and an out‑of‑bounds read. This vulnerability is fixed in 1.5.0rc4 and 1.4.3rc2."},{"lang":"es","value":"BACnet Stack es una librería C de pila de protocolo de código abierto BACnet para sistemas embebidos. Antes de 1.5.0rc4 y 1.4.3rc2, una solicitud WriteProperty malformada puede desencadenar un desbordamiento negativo de longitud en la pila BACnet, lo que lleva a una lectura fuera de límites y un fallo (DoS). El problema está en wp.c dentro de wp_decode_service_request. Al decodificar la etiqueta de contexto de prioridad opcional, el código pasa apdu_len - apdu_size a bacnet_unsigned_context_decode sin validar que apdu_size &lt;= apdu_len. Si una APDU truncada alcanza esta ruta, apdu_len - apdu_size sufre un desbordamiento negativo, lo que resulta en un tamaño grande siendo utilizado para la decodificación y una lectura fuera de límites. Esta vulnerabilidad está corregida en 1.5.0rc4 y 1.4.3rc2."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"bacnet-stack","product":"bacnet-stack","versions":[{"version":">= 1.5.0rc1, < 1.5.0rc4","status":"affected"},{"version":"< 1.4.3rc2","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"PROOF_OF_CONCEPT","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-02-13T18:49:44.498242Z","id":"CVE-2026-26264","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-125"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:bacnetstack:bacnet_stack:*:*:*:*:*:*:*:*","versionStartIncluding":"1.4.0","versionEndExcluding":"1.4.3","matchCriteriaId":"9BAD4B36-9061-453C-9C23-231993F1E69E"},{"vulnerable":true,"criteria":"cpe:2.3:a:bacnetstack:bacnet_stack:1.4.3:rc1:*:*:*:*:*:*","matchCriteriaId":"F4D20F1C-637A-4398-AD64-43C05692782D"},{"vulnerable":true,"criteria":"cpe:2.3:a:bacnetstack:bacnet_stack:1.5.0:rc1:*:*:*:*:*:*","matchCriteriaId":"2B47182E-6B7F-4C53-904A-EB37C9C0A439"},{"vulnerable":true,"criteria":"cpe:2.3:a:bacnetstack:bacnet_stack:1.5.0:rc2:*:*:*:*:*:*","matchCriteriaId":"CF491863-1A31-4A23-A6AC-DF7545FCAA48"},{"vulnerable":true,"criteria":"cpe:2.3:a:bacnetstack:bacnet_stack:1.5.0:rc3:*:*:*:*:*:*","matchCriteriaId":"DAB57C9E-9ABF-41FD-8D30-7C319ED23227"}]}]}],"references":[{"url":"https://github.com/bacnet-stack/bacnet-stack/commit/4cc8067c86f26e2b08b2c8f4d27f8e07de4d4708","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-phjh-v45p-gmjj","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]}]}}]}