{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-121517", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-11-03T14:22:35.275Z", "datePublished": "2026-11-03T21:00:15.953Z", "dateUpdated": "2026-11-03T21:00:15.953Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-11-03T21:00:15.953Z"}, "title": "IrfanView TIFF Wang Annotation heap-based overflow", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-122", "lang": "en", "description": "Heap-based Buffer Overflow"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-119", "lang": "en", "description": "Memory Corruption"}]}], "affected": [{"vendor": "n/a", "product": "IrfanView", "versions": [{"version": "4.76.0.0", "status": "affected"}], "cpes": ["cpe:2.3:a:irfanview:irfanview:*:*:*:*:*:*:*:*"], "modules": ["TIFF Wang Annotation Handler"]}], "descriptions": [{"lang": "en", "value": "A vulnerability was detected in IrfanView 4.76.0.0 on Win64. Affected by this vulnerability is an unknown functionality of the component TIFF Wang Annotation Handler. Performing a manipulation results in heap-based buffer overflow. The attack is possible to be carried out remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit is now public and may be used. It is recommended to apply a patch to fix this issue. The vendor confirms: \"[T]he TIF-Annotations option is OFF by default. Means, normal users are not affected ... the danger level for this is low\"."}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 2.3, "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P", "baseSeverity": "LOW"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 5, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C", "baseSeverity": "MEDIUM"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 5, "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C", "baseSeverity": "MEDIUM"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 5.1, "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C"}}], "timeline": [{"time": "2026-11-03T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-11-03T01:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-11-03T15:27:40.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "dwbruijn (VulDB User)", "type": "reporter"}, {"lang": "en", "value": "VulDB CNA Team", "type": "coordinator"}], "references": [{"url": "https://vuldb.com/vuln/430288", "name": "VDB-430288 | IrfanView TIFF Wang Annotation heap-based overflow", "tags": ["vdb-entry"]}, {"url": "https://vuldb.com/vuln/430288/cti", "name": "VDB-430288 | CTI Indicators (IOB, IOC)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/cve/CVE-2026-121517", "name": "CVE-2026-121517 | CVE Analysis and Report", "tags": ["third-party-advisory"]}, {"url": "https://vuldb.com/submit/1018543", "name": "Submit #1018543 | IrfanView 4.76.0.0 (x64) Heap-based Buffer Overflow", "tags": ["third-party-advisory"]}, {"url": "https://github.com/dwBruijn/CVEs/blob/main/IrfanView/TIFF/Tiff_Wang.md", "tags": ["exploit"]}, {"url": "https://www.irfanview.com/", "tags": ["product"]}], "tags": ["x_freeware"], "x_generator": ["VulDB PVTS v202611"]}}}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:irfanview:irfanview:*:*:*:*:*:*:*:*"], "modules": ["TIFF Wang Annotation Handler"], "product": "IrfanView", "vendor": "n/a", "versions": [{"status": "affected", "version": "4.76.0.0"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was detected in IrfanView 4.76.0.0 on Win64. Affected by this vulnerability is an unknown functionality of the component TIFF Wang Annotation Handler. Performing a manipulation results in heap-based buffer overflow. The attack is possible to be carried out remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit is now public and may be used. It is recommended to apply a patch to fix this issue. The vendor confirms: \"[T]he TIF-Annotations option is OFF by default. Means, normal users are not affected ... the danger level for this is low\"."}], "id": "CVE-2026-121517", "lastModified": "2026-11-03T21:17:37.663", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.1, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 4.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 3.4, "source": "cna@vuldb.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 1.3, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}]}, "published": "2026-11-03T21:17:37.490", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/dwBruijn/CVEs/blob/main/IrfanView/TIFF/Tiff_Wang.md"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/cve/CVE-2026-121517"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/1018543"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/430288"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/430288/cti"}, {"source": "cna@vuldb.com", "url": "https://www.irfanview.com/"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-122"}], "source": "cna@vuldb.com", "type": "Primary"}]}

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