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CVE-2021-37588

21
FAUCET Score

CVE-2021-37588 describes a cryptographic vulnerability in Charm version 0.43, specifically affecting the YCT14 data decryption process. Rated as Medium severity (CVSS 5.9), this flaw allows two colluding users to decrypt sensitive YCT14 data due to weak cryptographic practices (CWE-327), requiring high attack complexity but no user interaction. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.43CPE matchmatch criteria
cpe:2.3:a:jhu:charm:0.43:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.91%
Probability of exploitation in next 30 days
EPSS Percentile
56.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0091 is in the 13th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

eprint.iacr.org / 2020/460
Third Party Advisory
github.com / JHUISI/charm/blob/dev/charm/schemes/abenc/abenc_yct14.py
Third Party Advisory
github.com / JHUISI/charm/issues/276
Issue TrackingThird Party Advisory
www2.hci.uni-hannover.de / papers/Tan2019.pdf
Technical DescriptionThird Party Advisory