How severe is CVE-2021-38187?

CVE-2021-38187 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-38187 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38187?

CVE-2021-38187 affects Anymap Project Anymap. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38187?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-38187 published?

CVE-2021-38187 was published on 2021-08-08 and last updated on 2026-06-17.

CVE-2021-38187

CVE-2021-38187 is a critical-severity vulnerability in Anymap Project Anymap with a CVSS 3.x base score of 9.8. 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-681.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-681
Affected product: Anymap Project Anymap
Published: 2021-08-08
Last modified: 2026-06-17

Description

An issue was discovered in the anymap crate through 0.12.1 for Rust. It violates soundness via conversion of a *u8 to a *u64.

Frequently asked questions

What is CVE-2021-38187?: An issue was discovered in the anymap crate through 0.12.1 for Rust. It violates soundness via conversion of a *u8 to a *u64.
How severe is CVE-2021-38187?: CVE-2021-38187 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-38187 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38187?: CVE-2021-38187 affects Anymap Project Anymap. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38187?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-38187 published?: CVE-2021-38187 was published on 2021-08-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:anymap_project:anymap:*:*:*:*:*:rust:*:*

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