CVE-2021-39856
CVSS V2 Medium 4.3
CVSS V3 Medium 6.5
Description
Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue requires user interaction in that a victim must visit an attacker controlled web page.
Overview
- CVE ID
- CVE-2021-39856
- Assigner
- psirt@adobe.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-09-29T16:15:10
- Last Modified Date
- 2022-02-05T02:17:49
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* | 1 | OR | 17.011.30059 | 17.011.30199 |
| cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* | 1 | OR | 17.011.30059 | 17.011.30199 |
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* | 1 | OR | 20.001.30005 | 20.004.30006 |
| cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* | 1 | OR | 20.001.30005 | 20.004.30006 |
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* | 1 | OR | 15.008.20082 | 21.005.20058 |
| cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* | 1 | OR | 15.008.20082 | 21.005.20058 |
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* | 1 | OR | 15.008.20082 | 21.005.20060 |
| cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* | 1 | OR | 15.008.20082 | 21.005.20060 |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:P/I:N/A:N
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat/apsb21-55.html | Release Notes Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-39856 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39856 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:34:10 | Added to TrackCVE | |||
| 2022-12-05 11:30:48 | 2021-09-29T16:15Z | 2021-09-29T16:15:10 | CVE Published Date | updated |
| 2022-12-05 11:30:48 | 2022-02-05T02:17:49 | CVE Modified Date | updated | |
| 2022-12-05 11:30:48 | Analyzed | Vulnerability Status | updated |