CVE-2021-28546
Published: 01 April 2021
Summary
CVE-2021-28546 is a medium-severity Missing Support for Integrity Check (CWE-353) vulnerability in Adobe Acrobat. Its CVSS base score is 6.5 (Medium).
Operationally, ranked in the top 32.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-15222
Vulnerability details
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are missing support for an integrity check. An unauthenticated attacker could leverage this vulnerability to modify content in a certified PDF without invalidating the certification.…
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Exploitation of this issue requires user interaction in that a victim must open the tampered file.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Irrefutable evidence of actions requires integrity protection to prevent tampering or alteration of records.
Implements required signature-based integrity verification, addressing missing support for integrity checks on components.
Requiring control over the integrity of all changes directly compels developers to implement integrity verification mechanisms rather than omitting them.
Tamper detection fundamentally depends on integrity-checking capabilities that this control mandates or strengthens.
Explicitly requires support for integrity and authenticity checks on components before acceptance into the system.
Supplies the integrity-check artifacts (e.g., RRSIG, DNSKEY) that were previously missing for DNS responses.
Control explicitly adds support for integrity mechanisms such as checksums during preparation, preventing attacks that rely on missing integrity checks.
Directly supplies the missing integrity verification mechanism the weakness describes.