CVE-2021-21017 (GCVE-0-2021-21017)
Vulnerability from cvelistv5 – Published: 2021-02-11 19:42 – Updated: 2025-10-21 23:35Title
Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
8.8 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-04 21:28 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow (CWE-122)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Adobe | Acrobat Reader |
Affected:
unspecified , ≤ 2020.013.20074
(custom)
Affected: unspecified , ≤ 2020.001.30018 (custom) Affected: unspecified , ≤ 2017.011.30188 (custom) Affected: unspecified , ≤ None (custom) |
guessed |
Date Public
2021-02-09 00:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c5fbdf58-42ba-45b4-b0bb-fb119eec4779
Exploited: Yes
Timestamps
First Seen: 2021-11-03
Asserted: 2021-11-03
Scope
Notes: KEV entry: Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability | Affected: Adobe / Acrobat and Reader | Description: Acrobat Acrobat and Reader contain a heap-based buffer overflow vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user. | Required action: Apply updates per vendor instructions. | Due date: 2021-11-17 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-21017
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-122 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Acrobat and Reader |
| Due Date | 2021-11-17 |
| Date Added | 2021-11-03 |
| Vendorproject | Adobe |
| Vulnerabilityname | Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 13:26 UTC
| Updated: 2026-02-06 07:53 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 255defaf-ceb2-420d-8ebc-b7a4109a80bb
Exploited: Yes
Timestamps
First Seen: 2021-11-03
Asserted: 2021-11-03
Scope
Notes: KEVIntel entry: Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution | Affected: Adobe / Acrobat Reader | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution |
| Vendor | Adobe |
| Product | Acrobat Reader |
| Added Date | 2021-11-03T00:00:00.000Z |
| Cvss Score | 8.8 |
| Epss Score | None |
| Cvss Severity | HIGH |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 11:13 UTC
| Updated: 2026-06-23 11:13 UTC
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T17:53:23.127Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-21017",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-04T21:28:57.359205Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2021-11-03",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-10-21T23:35:28.186Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017"
}
],
"timeline": [
{
"lang": "en",
"time": "2021-11-03T00:00:00.000Z",
"value": "CVE-2021-21017 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Acrobat Reader",
"vendor": "Adobe",
"versions": [
{
"lessThanOrEqual": "2020.013.20074",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThanOrEqual": "2020.001.30018",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThanOrEqual": "2017.011.30188",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThanOrEqual": "None",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"datePublic": "2021-02-09T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "Heap-based Buffer Overflow (CWE-122)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-02-11T19:42:20.000Z",
"orgId": "078d4453-3bcd-4900-85e6-15281da43538",
"shortName": "adobe"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution",
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "psirt@adobe.com",
"DATE_PUBLIC": "2021-02-09T23:00:00.000Z",
"ID": "CVE-2021-21017",
"STATE": "PUBLIC",
"TITLE": "Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Acrobat Reader",
"version": {
"version_data": [
{
"version_affected": "\u003c=",
"version_value": "2020.013.20074"
},
{
"version_affected": "\u003c=",
"version_value": "2020.001.30018"
},
{
"version_affected": "\u003c=",
"version_value": "2017.011.30188"
},
{
"version_affected": "\u003c=",
"version_value": "None"
}
]
}
}
]
},
"vendor_name": "Adobe"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "None",
"attackVector": "None",
"availabilityImpact": "None",
"baseScore": 8.8,
"baseSeverity": "High",
"confidentialityImpact": "None",
"integrityImpact": "None",
"privilegesRequired": "None",
"scope": "None",
"userInteraction": "None",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Heap-based Buffer Overflow (CWE-122)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html",
"refsource": "MISC",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html"
}
]
},
"source": {
"discovery": "EXTERNAL"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "078d4453-3bcd-4900-85e6-15281da43538",
"assignerShortName": "adobe",
"cveId": "CVE-2021-21017",
"datePublished": "2021-02-11T19:42:20.225Z",
"dateReserved": "2020-12-18T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:35:28.186Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"cisa_known_exploited": {
"cveID": "CVE-2021-21017",
"cwes": [
"CWE-122"
],
"dateAdded": "2021-11-03",
"dueDate": "2021-11-17",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2021-21017",
"product": "Acrobat and Reader",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Acrobat Acrobat and Reader contain a heap-based buffer overflow vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user.",
"vendorProject": "Adobe",
"vulnerabilityName": "Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability"
},
"epss": {
"cve": "CVE-2021-21017",
"date": "2026-09-20",
"epss": "0.86326",
"percentile": "0.99725"
},
"nvd": {
"cve": {
"cisaActionDue": "2021-11-17",
"cisaExploitAdd": "2021-11-03",
"cisaRequiredAction": "Apply updates per vendor instructions.",
"cisaVulnerabilityName": "Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability",
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*",
"matchCriteriaId": "CC23AA00-FC0B-4CA7-83CF-D11CB679630C",
"versionEndIncluding": "17.011.30188",
"versionStartIncluding": "17.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*",
"matchCriteriaId": "2B0D84BC-88D8-4B29-BF4C-DE3D27D0EFF3",
"versionEndIncluding": "20.001.30018",
"versionStartIncluding": "20.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*",
"matchCriteriaId": "BAA2B3BC-EA31-445B-9D6F-1A3D86030F98",
"versionEndIncluding": "20.013.20074",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*",
"matchCriteriaId": "33305687-D4B1-4A48-B6B3-0619038243BF",
"versionEndIncluding": "17.011.30188",
"versionStartIncluding": "17.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*",
"matchCriteriaId": "4B989379-B8B7-4FA7-9319-F0FB8CA2253C",
"versionEndIncluding": "20.001.300183",
"versionStartIncluding": "20.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*",
"matchCriteriaId": "E5BC145F-0696-4B2F-AEC5-4FDB25E8EA6E",
"versionEndIncluding": "20.013.20074",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*",
"matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E",
"vulnerable": false
},
{
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."
},
{
"lang": "es",
"value": "Acrobat Reader DC versiones 2020.013.20074 (y anteriores), versiones 2020.001.30018 (y anteriores) y versiones 2017.011.30188 (y anteriores), est\u00e1n afectadas por una vulnerabilidad de desbordamiento de b\u00fafer en la regi\u00f3n heap de la memoria.\u0026#xa0;Un atacante no autenticado podr\u00eda aprovechar esta vulnerabilidad para alcanzar una ejecuci\u00f3n de c\u00f3digo arbitraria en el contexto del usuario actual.\u0026#xa0;Una explotaci\u00f3n de este problema requiere una interacci\u00f3n del usuario, ya que la v\u00edctima debe abrir un archivo malicioso"
}
],
"id": "CVE-2021-21017",
"lastModified": "2025-10-23T14:51:12.120",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 6.8,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9,
"source": "psirt@adobe.com",
"type": "Secondary"
}
]
},
"published": "2021-02-11T20:15:13.997",
"references": [
{
"source": "psirt@adobe.com",
"tags": [
"Vendor Advisory"
],
"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017"
}
],
"sourceIdentifier": "psirt@adobe.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-122"
}
],
"source": "psirt@adobe.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-787"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T14:59:05+00:00",
"cve": "CVE-2021-21017",
"id": "CVE-2021-21017",
"initial_release_date": "2021-02-09T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-21017.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T17:53:23.127Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-21017",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-04T21:28:57.359205Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2021-11-03",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-02-04T21:29:05.308Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017"
}
],
"timeline": [
{
"lang": "en",
"time": "2021-11-03T00:00:00.000Z",
"value": "CVE-2021-21017 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Acrobat Reader",
"vendor": "Adobe",
"versions": [
{
"lessThanOrEqual": "2020.013.20074",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThanOrEqual": "2020.001.30018",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThanOrEqual": "2017.011.30188",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThanOrEqual": "None",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"datePublic": "2021-02-09T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "Heap-based Buffer Overflow (CWE-122)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-02-11T19:42:20.000Z",
"orgId": "078d4453-3bcd-4900-85e6-15281da43538",
"shortName": "adobe"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution",
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "psirt@adobe.com",
"DATE_PUBLIC": "2021-02-09T23:00:00.000Z",
"ID": "CVE-2021-21017",
"STATE": "PUBLIC",
"TITLE": "Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Acrobat Reader",
"version": {
"version_data": [
{
"version_affected": "\u003c=",
"version_value": "2020.013.20074"
},
{
"version_affected": "\u003c=",
"version_value": "2020.001.30018"
},
{
"version_affected": "\u003c=",
"version_value": "2017.011.30188"
},
{
"version_affected": "\u003c=",
"version_value": "None"
}
]
}
}
]
},
"vendor_name": "Adobe"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a heap-based buffer overflow vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "None",
"attackVector": "None",
"availabilityImpact": "None",
"baseScore": 8.8,
"baseSeverity": "High",
"confidentialityImpact": "None",
"integrityImpact": "None",
"privilegesRequired": "None",
"scope": "None",
"userInteraction": "None",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Heap-based Buffer Overflow (CWE-122)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html",
"refsource": "MISC",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb21-09.html"
}
]
},
"source": {
"discovery": "EXTERNAL"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "078d4453-3bcd-4900-85e6-15281da43538",
"assignerShortName": "adobe",
"cveId": "CVE-2021-21017",
"datePublished": "2021-02-11T19:42:20.225Z",
"dateReserved": "2020-12-18T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:35:28.186Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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…