{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-15340", "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "state": "PUBLISHED", "assignerShortName": "icscert", "dateReserved": "2026-07-09T19:50:39.306Z", "datePublished": "2026-10-09T14:52:43.517Z", "dateUpdated": "2026-10-11T17:05:28.240Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2026-10-09T14:52:43.517Z" }, "title": "Savannah lwIP SMTP client Classic Buffer Overflow", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-120", "description": "CWE-120", "type": "CWE" } ] } ], "affected": [ { "vendor": "Savannah", "product": "lwIP SMTP client", "versions": [ { "status": "affected", "version": "2.2.1" }, { "status": "unaffected", "version": "patch_125_smtp_txbuf.diff" }, { "status": "unaffected", "version": "git commit (614420f82c8729d070e01464c0dddb3c9525c772)" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow." } ] } ], "references": [ { "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-279-02" }, { "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-279-02.json" } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "CRITICAL", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "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": 9.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N" } } ], "solutions": [ { "lang": "en", "value": "xchglabs reports that the vulnerability was fixed and released in the following patch: patch_125_smtp_txbuf.diff . This is available as available as git commit (614420f82c8729d070e01464c0dddb3c9525c772)", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "xchglabs reports that the vulnerability was fixed and released in the following patch: patch_125_smtp_txbuf.diff . This is available as available as git commit (614420f82c8729d070e01464c0dddb3c9525c772)" } ] } ], "credits": [ { "lang": "en", "value": "xchglabs reported this vulnerability directly to Savannah and then disclosed once the fix was released.", "type": "finder" } ], "source": { "advisory": "ICSA-26-279-02", "discovery": "EXTERNAL" }, "x_generator": { "engine": "Vulnogram 1.0.5" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-15340", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-11T16:49:07.157717Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-11T17:05:28.240Z" } } ] } }