{"id":"CVE-2026-16815","state":"PUBLISHED","title":"IBM i is Affected By Multiple Vulnerabilities in Simple Mail Transfer Protocol","description":"IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service and potentially obtain sensitive information due to a stack-based buffer overflow.","publishedAt":"2026-08-13T19:40:44.965Z","updatedAt":"2026-08-14T16:47:07.827Z","severity":{"score":8.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","source":"ibm"},"assigner":"ibm","products":["IBM 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i is Affected By Multiple Vulnerabilities in Simple Mail Transfer Protocol","descriptions":[{"lang":"en","value":"IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service and potentially obtain sensitive information due to a stack-based buffer overflow."}],"affected":[{"vendor":"IBM","product":"i","versions":[{"version":"7.6","status":"affected"},{"version":"7.5","status":"affected"},{"version":"7.4","status":"affected"},{"version":"7.3","status":"affected"}],"cpes":["cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*","cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*","cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*","cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*","cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*","cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*","cpe:2.3:a:ibm:i:7.3:*:*:*:*:*:*:*","cpe:2.3:a:ibm:i:7.3.0:*:*:*:*:*:*:*"]}],"references":[{"url":"https://www.ibm.com/support/pages/node/7283291","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":8.6,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787 Out-of-bounds Write","type":"CWE"}]}],"providerMetadata":{"shortName":"ibm","orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateUpdated":"2026-08-13T19:40:44.965Z"},"solutions":[{"lang":"en","value":"IBM strongly recommends addressing the vulnerability now.\n\nIBM i Release5770-TC1\nPTF Number(s)PTF Download Link(s)7.6SJ11061\nSJ11131 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11061 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11131 7.5SJ11074\nSJ11129\n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11074 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11129 7.4SJ11083\nSJ11127\n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11083 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11127 7.3SJ11084\nSJ11123 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11084 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11123  https://www.ibm.com/mysupport/s/fix-information \n\n\n\nIBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p><strong>IBM strongly recommends addressing the vulnerability now.</strong></p><div><table><colgroup><col/><col/><col/></colgroup><thead><tr><td><strong>IBM i Release</strong></td><td><strong>5770-TC1<br/>PTF Number(s)</strong></td><td><strong>PTF Download Link(s)</strong></td></tr></thead><tbody><tr><td>7.6</td><td>SJ11061<br/>SJ11131</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11061\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11061</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11131\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11131</a></td></tr><tr><td>7.5</td><td>SJ11074<br/>SJ11129<br/></td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11074\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11074</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11129\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11129</a></td></tr><tr><td>7.4</td><td>SJ11083<br/>SJ11127<br/></td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11083\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11083</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11127\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11127</a></td></tr><tr><td>7.3</td><td>SJ11084<br/>SJ11123</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11084\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11084</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11123\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11123 </a></td></tr></tbody></table></div><p>IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.</p>"}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-14T16:46:38.547236Z","id":"CVE-2026-16815","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-14T16:47:07.827Z"}}]}}}