Out-of-bounds Read in Adobe Acrobat
CVE-2021-21042
Acrobat Reader DC versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by an Out-of-bounds Read vulnerability that could lead to arbitrary disclosure of information in the memory stack. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Vulnerability class: Buffer Overflow
EPSS: 0.147 (96.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@adobe.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-21042?
- CVE-2021-21042 is a medium-severity vulnerability in Adobe Acrobat, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2021-02-11.
- How severe is CVE-2021-21042?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-21042 known to be exploited?
- 16 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.