THREATPORT/VULNERABILITY/CVE-2021-21042
MEDIUM SEVERITY

CVE-2021-21042

Acrobat vulnerability

CVSS
6.5
EPSS
14.7%
EPSS pct
96th
Exploited
No known
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.
Affected vendor
Adobe
Affected product
Acrobat
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness type (CWE)
Published
2021-02-11

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 14.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2021-21042

  • Confirm whether Adobe Acrobat is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-21042.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-21042

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-21042 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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