Is CVE-2021-28032 actively exploited?

No active exploitation of CVE-2021-28032 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-28032 be exploited remotely?

Yes. CVE-2021-28032 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-28032?

CVE-2021-28032 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-28032

CRITICAL

CVE-2021-28032

NVD-CWE-OtherPublished: March 5, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An issue was discovered in the nano_arena crate before 0.5.2 for Rust. There is an aliasing violation in split_at because two mutable references can exist for the same element, if Borrow<Idx> behaves in certain ways. This can have a resultant out-of-bounds write or use-after-free.

NVD Source

Technical Analysis

CVE-2021-28032 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.