01 Record
CVE-2021-39842
Adobe Acrobat Reader DC messageHandler.OnMessage Use-After-Free Vulnerability
HighPUBLISHEDCNA: adobe
CNA base score7.8 CVSS v3.xCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
02 Description
Adobe Acrobat Reader DC messageHandler.OnMessage Use-After-Free Vulnerability
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 17.35% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 96.8% of scored records. A rank, not a probability.
- NVD base score
- 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-09-29 15:38Z5 YR AGO
- Last updated
- 2024-09-17 01:10Z2 YR AGO
- Reserved
- 2021-08-23
- Assigning CNA
- adobe
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.8)
- CNA CVSS vector
- CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416Use After FreeVariant
- Data version
- 5.1
- Document digest
- 652f684ea0bd0e4eee66aa2cd8b14f7b6ba8b26925d188f849cff10c64d37b3c
05 Affected products
VendorProductVersionsPlatforms