{"id":"CVE-2026-112161","state":"PUBLISHED","title":"Lack of integrity checks in Mobatek’s MobaXterm","description":"MobaXterm Personal Edition (Portable) 26.4 GA extracts the CygUtils64.plugin file without first verifying its integrity. A local attacker with write permissions on this file can replace the ‘bin/cygwin1.dll’ library contained within it with a malicious library. When the victim opens a Local Shell session or uses a Cygwin-based function, the application extracts the component and loads the tampered library, executing code with the victim’s permissions. Exploitation requires write access to the plugin and does not, in itself, involve privilege escalation.","publishedAt":"2026-10-19T08:19:20.794Z","updatedAt":"2026-10-20T18:20:13.384Z","severity":{"score":8.5,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"INCIBE"},"assigner":"INCIBE","products":["Mobatek MobaXterm"],"affected":[{"vendor":"Mobatek","product":"MobaXterm","defaultStatus":"unaffected","versions":[{"version":"26.4 GA","status":"affected"}]}],"references":["https://www.incibe.es/en/incibe-cert/notices/aviso/lack-integrity-checks-mobateks-mobaxterm"],"weaknesses":["CWE-345"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/112xxx/CVE-2026-112161.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-112161","state":"PUBLISHED","datePublished":"2026-10-19T08:19:20.794Z","dateUpdated":"2026-10-20T18:20:13.384Z","assignerShortName":"INCIBE","assignerOrgId":"0cbda920-cd7f-484a-8e76-bf7f4b7f4516","dateReserved":"2026-10-19T07:34:11.465Z"},"containers":{"cna":{"title":"Lack of integrity checks in Mobatek’s MobaXterm","descriptions":[{"lang":"en","value":"MobaXterm Personal Edition (Portable) 26.4 GA extracts the CygUtils64.plugin file without first verifying its integrity. A local attacker with write permissions on this file can replace the ‘bin/cygwin1.dll’ library contained within it with a malicious library. When the victim opens a Local Shell session or uses a Cygwin-based function, the application extracts the component and loads the tampered library, executing code with the victim’s permissions. Exploitation requires write access to the plugin and does not, in itself, involve privilege escalation."}],"affected":[{"vendor":"Mobatek","product":"MobaXterm","defaultStatus":"unaffected","versions":[{"version":"26.4 GA","status":"affected"}]}],"references":[{"url":"https://www.incibe.es/en/incibe-cert/notices/aviso/lack-integrity-checks-mobateks-mobaxterm"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","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":"HIGH","baseScore":8.5,"vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-345","lang":"en","description":"CWE-345 Insufficient Verification of Data Authenticity","type":"CWE"}]}],"providerMetadata":{"shortName":"INCIBE","orgId":"0cbda920-cd7f-484a-8e76-bf7f4b7f4516","dateUpdated":"2026-10-19T08:19:20.794Z"},"datePublic":"2026-10-19T08:07:00.000Z","cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mobatek:mobaxterm:26.4_ga:*:*:*:*:*:*:*"}]}]}],"solutions":[{"lang":"en","value":"Update MobaXterm to version 26.5, released on 11 September 2026, or to a later version.","supportingMedia":[{"type":"text/html","base64":false,"value":"Update MobaXterm to version 26.5, released on 11 September 2026, or to a later version."}]}],"credits":[{"lang":"en","value":"Pedro J. Nunez-Cacho Fuentes (@tunelko)","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T18:19:57.282863Z","id":"CVE-2026-112161","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-20T18:20:13.384Z"}}]}}}