CVE-2026-3776 (GCVE-0-2026-3776)
Vulnerability from cvelistv5 – Published: 2026-04-01 01:40 – Updated: 2026-04-02 02:12
VLAI
EPSS
VEX
Title
Null pointer dereference in Foxit PDF Editor/Reader when accessing stamp annotation
Summary
The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated object without a prior null or validity check, which allows a crafted document to trigger a null pointer dereference and crash the application, resulting in denial of service.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-01 14:16 UTC
CWE
- CWE-476 - NULL pointer dereference
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Foxit Software Inc. | Foxit PDF Editor |
Affected:
Versions 2025.3 and earlier
Affected: Versions 14.0.2 and earlier Affected: Versions 13.2.2 and earlier |
guessed | |
| Foxit Software Inc. | Foxit PDF Reader |
Affected:
Versions 2025.3 and earlier
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-3776",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-01T14:16:53.743286Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-01T15:50:55.555Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"Windows",
"MacOS"
],
"product": "Foxit PDF Editor",
"vendor": "Foxit Software Inc.",
"versions": [
{
"status": "affected",
"version": "Versions 2025.3 and earlier"
},
{
"status": "affected",
"version": "Versions 14.0.2 and earlier"
},
{
"status": "affected",
"version": "Versions 13.2.2 and earlier"
}
]
},
{
"defaultStatus": "unaffected",
"platforms": [
"Windows",
"MacOS"
],
"product": "Foxit PDF Reader",
"vendor": "Foxit Software Inc.",
"versions": [
{
"status": "affected",
"version": "Versions 2025.3 and earlier"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Suyue Guo from UCSB Seclab"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated object without a prior null or validity check, which allows a crafted document to trigger a null pointer dereference and crash the application, resulting in denial of service."
}
],
"value": "The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated object without a prior null or validity check, which allows a crafted document to trigger a null pointer dereference and crash the application, resulting in denial of service."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Denial of service"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-476",
"description": "CWE-476 NULL pointer dereference",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-02T02:12:28.499Z",
"orgId": "14984358-7092-470d-8f34-ade47a7658a2",
"shortName": "Foxit"
},
"references": [
{
"url": "https://www.foxit.com/support/security-bulletins.html"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Null pointer dereference in Foxit PDF Editor/Reader when accessing stamp annotation",
"x_generator": {
"engine": "Vulnogram 1.0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "14984358-7092-470d-8f34-ade47a7658a2",
"assignerShortName": "Foxit",
"cveId": "CVE-2026-3776",
"datePublished": "2026-04-01T01:40:35.260Z",
"dateReserved": "2026-03-08T03:43:23.264Z",
"dateUpdated": "2026-04-02T02:12:28.499Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-3776",
"date": "2026-09-18",
"epss": "0.00103",
"percentile": "0.0113"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"platforms": [
"Windows",
"MacOS"
],
"product": "Foxit PDF Editor",
"vendor": "Foxit Software Inc.",
"versions": [
{
"status": "affected",
"version": "Versions 2025.3 and earlier"
},
{
"status": "affected",
"version": "Versions 14.0.2 and earlier"
},
{
"status": "affected",
"version": "Versions 13.2.2 and earlier"
}
]
},
{
"defaultStatus": "unaffected",
"platforms": [
"Windows",
"MacOS"
],
"product": "Foxit PDF Reader",
"vendor": "Foxit Software Inc.",
"versions": [
{
"status": "affected",
"version": "Versions 2025.3 and earlier"
}
]
}
],
"source": "14984358-7092-470d-8f34-ade47a7658a2"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "8E9FD877-062E-4AE4-B7D7-91E1CA8657DF",
"versionEndIncluding": "13.2.2.24014",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "6B7281CC-97ED-4441-BB97-6C73E328B9AD",
"versionEndIncluding": "14.0.2.33402",
"versionStartIncluding": "14.0.0.33046",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0C75FEE6-54F3-49C6-BAEA-A09D23BE5D64",
"versionEndIncluding": "2023.3.0.23028",
"versionStartIncluding": "2023.1.0.15510",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "2C06BC41-9831-4AE3-B10B-3FC313D01580",
"versionEndIncluding": "2024.4.1.27687",
"versionStartIncluding": "2024.1.0.23997",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "AD0AAFC0-5B9B-4A11-8967-4699792850F1",
"versionEndIncluding": "2025.3.0.35737",
"versionStartIncluding": "2025.1.0.27937",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1A7AD877-2AB4-4568-8109-5406D2259725",
"versionEndIncluding": "2025.3.0.35737",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "2C7DEE55-1FE3-4B41-975D-BB926E9E69D4",
"versionEndIncluding": "13.2.2.63349",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9D6DE6B5-F04E-4484-9BF9-397D49464636",
"versionEndIncluding": "14.0.2.69164",
"versionStartIncluding": "14.0.0.68868",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "D8785CCE-C44C-4908-9133-13A580D5BECB",
"versionEndIncluding": "2023.3.0.63083",
"versionStartIncluding": "2023.1.0.55583",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "CF043D20-0E28-481C-8756-D1301FAE67D2",
"versionEndIncluding": "2024.4.1.66479",
"versionStartIncluding": "2024.1.0.63682",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*",
"matchCriteriaId": "20698FD4-5E28-4206-ACEA-4FCD24AD23BE",
"versionEndIncluding": "2025.3.0.69570",
"versionStartIncluding": "2025.1.0.66692",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*",
"matchCriteriaId": "308530A9-A5C2-4293-BB02-00DDB6C17C37",
"versionEndIncluding": "2025.3.0.69570",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*",
"matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated object without a prior null or validity check, which allows a crafted document to trigger a null pointer dereference and crash the application, resulting in denial of service."
},
{
"lang": "es",
"value": "La aplicaci\u00f3n no valida la presencia de los datos de apariencia (AP) requeridos antes de acceder a los recursos de anotaci\u00f3n de sello. Cuando un PDF contiene una anotaci\u00f3n de sello a la que le falta su entrada AP, el c\u00f3digo contin\u00faa desreferenciando el objeto asociado sin una comprobaci\u00f3n previa de nulidad o validez, lo que permite que un documento manipulado active una desreferencia de puntero nulo y bloquee la aplicaci\u00f3n, lo que resulta en denegaci\u00f3n de servicio."
}
],
"id": "CVE-2026-3776",
"lastModified": "2026-06-17T10:44:11.880",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "14984358-7092-470d-8f34-ade47a7658a2",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-3776",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-01T14:16:53.743286Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-04-01T02:16:02.590",
"references": [
{
"source": "14984358-7092-470d-8f34-ade47a7658a2",
"tags": [
"Vendor Advisory"
],
"url": "https://www.foxit.com/support/security-bulletins.html"
}
],
"sourceIdentifier": "14984358-7092-470d-8f34-ade47a7658a2",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "14984358-7092-470d-8f34-ade47a7658a2",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-04-02T05:04:07+00:00",
"cve": "CVE-2026-3776",
"id": "CVE-2026-3776",
"initial_release_date": "2026-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Null pointer dereference in Foxit PDF Editor/Reader when accessing stamp annotation",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3776.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-3776",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-01T14:16:53.743286Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-01T14:17:15.666Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"Windows",
"MacOS"
],
"product": "Foxit PDF Editor",
"vendor": "Foxit Software Inc.",
"versions": [
{
"status": "affected",
"version": "Versions 2025.3 and earlier"
},
{
"status": "affected",
"version": "Versions 14.0.2 and earlier"
},
{
"status": "affected",
"version": "Versions 13.2.2 and earlier"
}
]
},
{
"defaultStatus": "unaffected",
"platforms": [
"Windows",
"MacOS"
],
"product": "Foxit PDF Reader",
"vendor": "Foxit Software Inc.",
"versions": [
{
"status": "affected",
"version": "Versions 2025.3 and earlier"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Suyue Guo from UCSB Seclab"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated object without a prior null or validity check, which allows a crafted document to trigger a null pointer dereference and crash the application, resulting in denial of service."
}
],
"value": "The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated object without a prior null or validity check, which allows a crafted document to trigger a null pointer dereference and crash the application, resulting in denial of service."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Denial of service"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-476",
"description": "CWE-476 NULL pointer dereference",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-02T02:12:28.499Z",
"orgId": "14984358-7092-470d-8f34-ade47a7658a2",
"shortName": "Foxit"
},
"references": [
{
"url": "https://www.foxit.com/support/security-bulletins.html"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Null pointer dereference in Foxit PDF Editor/Reader when accessing stamp annotation",
"x_generator": {
"engine": "Vulnogram 1.0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "14984358-7092-470d-8f34-ade47a7658a2",
"assignerShortName": "Foxit",
"cveId": "CVE-2026-3776",
"datePublished": "2026-04-01T01:40:35.260Z",
"dateReserved": "2026-03-08T03:43:23.264Z",
"dateUpdated": "2026-04-02T02:12:28.499Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…