7.8

CVE-2021-28631: adobe acrobat Use After Free

CVSS: 7.8v3.1HighModified
Published 24-08-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-28631 is a high (CVSS 7.8) Use After Free vulnerability in adobe acrobat. EPSS estimates a 4.71% chance of exploitation in the next 30 days, higher than 91.7% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
4.71%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-08-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

Acrobat Reader DC versions versions 2021.001.20155 (and earlier), 2020.001.30025 (and earlier) and 2017.011.30196 (and earlier) are affected by an Use After Free 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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

4.71%

Chance of exploitation in the next 30 days

Percentile

92%

Versus all other CVEs

30-day change

0.00 pp

From 4.71% on 19-09-2026

19-09-202619-10-2026
EPSS score
4.71%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Adobe4 products
  • acrobat≥ 17.011.30180, ≤ 17.011.30196 | ≥ 20.001.30005, ≤ 20.001.30025
  • acrobat_dc≥ 15.008.20082, ≤ 21.001.20155
  • acrobat_reader≥ unspecified, ≤ 2021.001.20155 | ≥ unspecified, ≤ 2020.001.30025 | ≥ unspecified, ≤ 2017.011.30196 | ≥ unspecified, ≤ None | ≥ 17.011.30180, ≤ 17.011.30196 | ≥ 20.001.30005, ≤ 20.001.30025
  • acrobat_reader_dc≥ 15.008.20082, ≤ 21.001.20155

1 vendor · 4 products

References

1 links