CVE-2026-121517 (GCVE-0-2026-121517)

Vulnerability from cvelistv5 – Published: 2026-11-03 21:00 – Updated: 2026-11-03 21:00 X_Freeware
VLAI
Title
IrfanView TIFF Wang Annotation heap-based overflow
Summary
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".
Severity
2.3 (Low)
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
5 (Medium)
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
5 (Medium)
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
CWE
Assigner
VulDB CNA under the mitre root
CNA scorecard B 83/100 over 3796 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
n/a IrfanView Affected: 4.76.0.0
    cpe:2.3:a:irfanview:irfanview:*:*:*:*:*:*:*:*
Credits
dwbruijn (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "dwbruijn (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "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": {
            "baseScore": 2.3,
            "baseSeverity": "LOW",
            "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",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
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            "baseSeverity": "MEDIUM",
            "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",
            "version": "3.1"
          }
        },
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            "baseSeverity": "MEDIUM",
            "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",
            "version": "3.0"
          }
        },
        {
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            "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-03T21:00:15.953Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-430288 | IrfanView TIFF Wang Annotation heap-based overflow",
          "tags": [
            "vdb-entry"
          ],
          "url": "https://vuldb.com/vuln/430288"
        },
        {
          "name": "VDB-430288 | CTI Indicators (IOB, IOC)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/430288/cti"
        },
        {
          "name": "CVE-2026-121517 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-121517"
        },
        {
          "name": "Submit #1018543 | IrfanView 4.76.0.0 (x64) Heap-based Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/1018543"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/dwBruijn/CVEs/blob/main/IrfanView/TIFF/Tiff_Wang.md"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.irfanview.com/"
        }
      ],
      "tags": [
        "x_freeware"
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-11-03T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-11-03T01:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-11-03T15:27:40.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "IrfanView TIFF Wang Annotation heap-based overflow",
      "x_generator": [
        "VulDB PVTS v202611"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-121517",
    "datePublished": "2026-11-03T21:00:15.953Z",
    "dateReserved": "2026-11-03T14:22:35.275Z",
    "dateUpdated": "2026-11-03T21:00:15.953Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-121517",
      "date": "2026-11-04",
      "epss": "0.00286",
      "percentile": "0.21298"
    },
    "nvd": {
      "cve": {
        "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"
            }
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        },
        "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"
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            "url": "https://vuldb.com/vuln/430288/cti"
          },
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            "url": "https://www.irfanview.com/"
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        "vulnStatus": "Deferred",
        "weaknesses": [
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            "description": [
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                "value": "CWE-119"
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            ],
            "source": "cna@vuldb.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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