How severe is CVE-2021-37588?

CVE-2021-37588 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-37588 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37588?

CVE-2021-37588 affects Jhu Charm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37588?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-37588 published?

CVE-2021-37588 was published on 2021-07-30 and last updated on 2026-06-17.

CVE-2021-37588

CVE-2021-37588 is a medium-severity vulnerability in Jhu Charm with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-327.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-327
Affected product: Jhu Charm
Published: 2021-07-30
Last modified: 2026-06-17

Description

In Charm 0.43, any two users can collude to achieve the ability to decrypt YCT14 data.

Frequently asked questions

What is CVE-2021-37588?: In Charm 0.43, any two users can collude to achieve the ability to decrypt YCT14 data.
How severe is CVE-2021-37588?: CVE-2021-37588 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-37588 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37588?: CVE-2021-37588 affects Jhu Charm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37588?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-37588 published?: CVE-2021-37588 was published on 2021-07-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jhu:charm:0.43:*:*:*:*:*:*:*

More vulnerabilities in Jhu Charm

CVE-2021-37587 — Medium (CVSS 6.5): In Charm 0.43, any single user can decrypt DAC-MACS or MA-ABE-YJ14 data.

All CVEs affecting Jhu Charm →

Other CWE-327 (Use of a Broken or Risky Cryptographic Algorithm) vulnerabilities

CVE-2026-50086 — Critical (CVSS 10.0): The Aqara IAM/SSO gateway (gw-builder.aqara.com) exposes bidirectional AES round-trups against the platform's signing…
CVE-2026-21718 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in Copeland XWEB Pro version 1.12.1 and prior, enabling any attackers to…
CVE-2025-54426 — Critical (CVSS 9.9): Polkadot Frontier is an Ethereum and EVM compatibility layer for Polkadot and Substrate. In versions prior to commit…
CVE-2024-51478 — Critical (CVSS 9.9): YesWiki is a wiki system written in PHP. Prior to 4.4.5, the use of a weak cryptographic algorithm and a hard-coded…
CVE-2026-28252 — Critical (CVSS 9.8): A Use of a Broken or Risky Cryptographic Algorithm vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge…
CVE-2025-13476 — Critical (CVSS 9.8): Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0–v25.8.1.0 uses a static and predictable TLS…

Browse all CWE-327 (Use of a Broken or Risky Cryptographic Algorithm) vulnerabilities →