CVE-2021-27376
CVSS v3
9.8
CRITICAL
EPSS Score
1.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in the nb-connect crate before 1.0.3 for Rust. It may have invalid memory access for certain versions of the standard library because it relies on a direct cast of std::net::SocketAddrV4 and std::net::SocketAddrV6 data structures.
Technical details
- Published
- 2021-02-18
Frequently asked questions
What is CVE-2021-27376?
An issue was discovered in the nb-connect crate before 1.0.3 for Rust. It may have invalid memory access for certain versions of the standard library because it relies on a direct cast of std::net::SocketAddrV4 and std::net::SocketAddrV6 data structures.
Is CVE-2021-27376 actively exploited?
Active exploitation of CVE-2021-27376 has not been confirmed. Its EPSS score was 1.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-27376?
CVE-2021-27376 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-27376 affecting your environment?
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