CVE-2026-4942

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4942", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "state": "PUBLISHED", "assignerShortName": "ibm", "dateReserved": "2026-03-26T21:14:44.344Z", "datePublished": "2026-07-17T19:32:02.440Z", "dateUpdated": "2026-07-20T13:52:49.123Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-07-17T19:32:02.440Z"}, "title": "IBM i is Affected by Algorithm Downgrade in Transport Layer Security []", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-757", "description": "CWE-757 Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')", "type": "CWE"}]}], "affected": [{"vendor": "IBM", "product": "i", "versions": [{"status": "affected", "version": "7.6"}, {"status": "affected", "version": "7.5"}, {"status": "affected", "version": "7.4"}, {"status": "affected", "version": "7.3"}], "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:*:*:*:*:*:*:*"]}], "descriptions": [{"lang": "en", "value": "IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to send a specifically crafted message and downgrade the Transport Layer Security (TLS) protocol to a version disabled in the server configuration.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to send a specifically crafted message and downgrade the Transport Layer Security (TLS) protocol to a version disabled in the server configuration.</p>"}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7278992", "tags": ["vendor-advisory", "patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseSeverity": "MEDIUM", "baseScore": 5.9, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}}], "solutions": [{"lang": "en", "value": "IBM i Release5770-SS1\nPTF Number(s)PTF Download Link(s)7.6MJ09141 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09141 7.5MJ09140 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09140 7.4MJ09139 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09139 7.3MJ09138 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09138 \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": "<div><table><colgroup><col/><col/><col/></colgroup><thead><tr><td><strong>IBM i Release</strong></td><td><strong>5770-SS1<br/>PTF Number(s)</strong></td><td><strong>PTF Download Link(s)</strong></td></tr></thead><tbody><tr><td>7.6</td><td>MJ09141</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09141\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09141</a></td></tr><tr><td>7.5</td><td>MJ09140</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09140\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09140</a></td></tr><tr><td>7.4</td><td>MJ09139</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09139\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09139</a></td></tr><tr><td>7.3</td><td>MJ09138</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09138\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09138</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>"}]}], "x_generator": {"engine": "ibm-cvegen"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-20T13:52:40.695670Z", "id": "CVE-2026-4942", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-20T13:52:49.123Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-4942", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-20T13:52:40.695670Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-20T13:52:45.468Z"}}], "cna": {"title": "IBM i is Affected by Algorithm Downgrade in Transport Layer Security []", "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "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:*:*:*:*:*:*:*"], "vendor": "IBM", "product": "i", "versions": [{"status": "affected", "version": "7.6"}, {"status": "affected", "version": "7.5"}, {"status": "affected", "version": "7.4"}, {"status": "affected", "version": "7.3"}]}], "solutions": [{"lang": "en", "value": "IBM i Release5770-SS1\nPTF Number(s)PTF Download Link(s)7.6MJ09141 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09141 7.5MJ09140 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09140 7.4MJ09139 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09139 7.3MJ09138 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09138 \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", "value": "<div><table><colgroup><col/><col/><col/></colgroup><thead><tr><td><strong>IBM i Release</strong></td><td><strong>5770-SS1<br/>PTF Number(s)</strong></td><td><strong>PTF Download Link(s)</strong></td></tr></thead><tbody><tr><td>7.6</td><td>MJ09141</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09141\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09141</a></td></tr><tr><td>7.5</td><td>MJ09140</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09140\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09140</a></td></tr><tr><td>7.4</td><td>MJ09139</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09139\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09139</a></td></tr><tr><td>7.3</td><td>MJ09138</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09138\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09138</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>", "base64": false}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7278992", "tags": ["vendor-advisory", "patch"]}], "x_generator": {"engine": "ibm-cvegen"}, "descriptions": [{"lang": "en", "value": "IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to send a specifically crafted message and downgrade the Transport Layer Security (TLS) protocol to a version disabled in the server configuration.", "supportingMedia": [{"type": "text/html", "value": "<p>IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to send a specifically crafted message and downgrade the Transport Layer Security (TLS) protocol to a version disabled in the server configuration.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-757", "description": "CWE-757 Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')"}]}], "providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-07-17T19:32:02.440Z"}}}, "cveMetadata": {"cveId": "CVE-2026-4942", "state": "PUBLISHED", "dateUpdated": "2026-07-20T13:52:49.123Z", "dateReserved": "2026-03-26T21:14:44.344Z", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "datePublished": "2026-07-17T19:32:02.440Z", "assignerShortName": "ibm"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"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:*:*:*:*:*:*:*"], "product": "i", "vendor": "IBM", "versions": [{"status": "affected", "version": "7.6"}, {"status": "affected", "version": "7.5"}, {"status": "affected", "version": "7.4"}, {"status": "affected", "version": "7.3"}]}], "source": "psirt@us.ibm.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:ibm:i:7.3:*:*:*:*:*:*:*", "matchCriteriaId": "9A49E8C5-7967-42AE-A787-C533D24A63D7", "vulnerable": true}, {"criteria": "cpe:2.3:o:ibm:i:7.4:*:*:*:*:*:*:*", "matchCriteriaId": "92D03306-B6C9-403E-99A2-CE9D8DC3B482", "vulnerable": true}, {"criteria": "cpe:2.3:o:ibm:i:7.5:*:*:*:*:*:*:*", "matchCriteriaId": "F7CCB5BF-08EF-472F-A663-5DE270234F10", "vulnerable": true}, {"criteria": "cpe:2.3:o:ibm:i:7.6:*:*:*:*:*:*:*", "matchCriteriaId": "AFFF96C2-7E0F-4DF9-AF51-3EE357D51095", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to send a specifically crafted message and downgrade the Transport Layer Security (TLS) protocol to a version disabled in the server configuration."}, {"lang": "es", "value": "IBM i 7.6, 7.5, 7.4 y 7.3 podr\u00edan permitir a un atacante remoto enviar un mensaje espec\u00edficamente dise\u00f1ado y degradar el protocolo Transport Layer Security (TLS) a una versi\u00f3n deshabilitada en la configuraci\u00f3n del servidor."}], "id": "CVE-2026-4942", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "psirt@us.ibm.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-4942", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-20T13:52:40.695670Z", "version": "2.0.3"}}]}, "published": "2026-07-17T20:17:23.560", "references": [{"source": "psirt@us.ibm.com", "tags": ["Vendor Advisory"], "url": "https://www.ibm.com/support/pages/node/7278992"}], "sourceIdentifier": "psirt@us.ibm.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-757"}], "source": "psirt@us.ibm.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.6"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.3"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "i", "source": "cna", "vendor": "IBM"}, "product": "i", "vendor": "ibm"}], "created": "2026-07-17T22:00:04.378524+00:00", "updated": "2026-07-30T23:45:05.262967+00:00", "vendors": ["ibm", "ibm$PRODUCT$i"]}