What is CVE-2021-30355?

CVE-2021-30355 is a high-severity vulnerability in Amazon Kindle, classified under Improper Privilege Management. CVSS score: 8.6/10. Published 2021-09-01.

How severe is CVE-2021-30355?

High severity. CVSS v3 base score is 8.6 out of 10.

Privilege escalation in Amazon Kindle

CVE-2021-30355

Amazon Kindle e-reader prior to and including version 5.13.4 improperly manages privileges, allowing the framework user to elevate privileges to root.

Vulnerability class: Privilege Escalation

Published 2021-09-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.069 (93.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.069 · newest: 0.069 · change: 0.000

Affected products

Amazon Kindle
Amazon Kindle Firmware
Amazon Kindle E-Reader — versions All versions prior to and including 5.13.4

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

research.checkpoint.com/2021/i-can-take-over-your-kindle/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-30355?: CVE-2021-30355 is a high-severity vulnerability in Amazon Kindle, classified under Improper Privilege Management. CVSS score: 8.6/10. Published 2021-09-01.
How severe is CVE-2021-30355?: High severity. CVSS v3 base score is 8.6 out of 10.