CVE-2021-21140

6.8 MEDIUM 0.8% exploit odds Fix listed

What it is

Uninitialized use in USB in Google Chrome prior to 88.0.4324.96 allowed a local attacker to potentially perform out of bounds memory access via via a USB device.

At a glance

Exploitability: Can be exploited with physical access without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 0.8% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2021-02-09 14:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 03:34 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.8% in the next 30 days (EPSS).
Severity: 6.8 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2021-02-09 14:15 UTC
Last modified: 2026-06-17 03:34 UTC
Exploit probability: 0.8% · EPSS, next 30 days
Weakness: CWE-119 · Buffer errors
Record status: Modified

Affected

Google Chrome < 88.0.4324.96
Microsoft Edge < 88.0.705.74

Attack profile CVSS 3.1 · 6.8

Attack vector: Physical
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-21140.md and follow it. Check whether this project is affected by CVE-2021-21140. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record