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CVE Record

CVE-2021-37587: In Charm 0.43, any single user can decrypt DAC-MACS or MA-ABE-YJ14 data.

In Charm 0.43, any single user can decrypt DAC-MACS or MA-ABE-YJ14 data.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Charm 0.43 reportedly cannot enforce intended access restrictions for DAC-MACS or MA-ABE-YJ14 encrypted data. The CVE states that any single user can decrypt such data, so organizations using these schemes should treat affected encrypted records as potentially exposed.

Executive priority

Prioritize investigation if Charm 0.43 protected confidential data or customer records. The business issue is not availability; it is whether encryption-based access controls failed and sensitive data must be considered exposed.

Technical view

The issue is in Charm 0.43 implementations of DAC-MACS and MA-ABE-YJ14 attribute-based encryption schemes. Source data indicates decryption is possible by any single user, undermining the schemes' access-control and confidentiality assumptions. No CVSS, CWE, patch version, or confirmed affected CPE is provided.

Likely exposure

Exposure is likely limited to systems, research prototypes, or applications that used Charm 0.43 with DAC-MACS or MA-ABE-YJ14 for protecting data. The source bundle does not identify broader products or deployments.

Exploitation context

No source in the bundle says this is actively exploited, and it is not listed as KEV. The issue is a cryptographic access-control failure; practical risk depends on whether affected schemes protected real sensitive data.

Researcher notes

Evidence is sparse: the CVE description is concise and severity metadata is absent. Research should focus on confirming exact Charm scheme usage, affected data flows, and whether maintainers published remediation guidance in the referenced issue or documentation.

Mitigation direction

  • Identify any use of Charm 0.43 in application dependencies.
  • Check whether DAC-MACS or MA-ABE-YJ14 protected production data.
  • Review project or vendor guidance for fixed versions or replacements.
  • Re-encrypt affected sensitive data with a validated unaffected scheme.
  • Treat previously protected data as potentially disclosed where exposure existed.

Validation and detection

  • Inventory code and dependency manifests for Charm 0.43.
  • Search application code for DAC-MACS and MA-ABE-YJ14 usage.
  • Map encrypted datasets to the scheme used to protect them.
  • Confirm whether affected data was accessible to any single user.
  • Document compensating controls and remaining confidentiality exposure.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2021-37587 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.