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No exploitation reported

CVE-2021-30354

No exploitation reported by the sources we read.

  • Published2021-09-01
  • WeaknessCWE-190 · CWE-680

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Amazon Kindle e-reader prior to and including version 5.13.4 contains an Integer Overflow that leads to a Heap-Based Buffer Overflow in function CJBig2Image::expand() and results in a memory corruption that leads to code execution when parsing a crafted PDF book.

Timeline

dates in UTC
  1. 2021-09-0118:15CVE publishedNVD

Versions per branch

NVD
Amazon kindle firmwareversion to verify
BranchAffectedFixed in
5.13≤ 5.13.4no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.18.6read 2026-10-23
  • NVDCVSS 2.09.3read 2026-10-23
  • CNAweakness (CWE)CWE-680known since 2026-10-23
  • NVDweakness (CWE)CWE-190read 2026-10-23
  • FIRST EPSSEPSS score8.4 %2026-11-08
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Published
2021-09-01
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-66c4-8x32-4mx8

Frequently asked questions

What is CVE-2021-30354?

Amazon Kindle e-reader prior to and including version 5.13.4 contains an Integer Overflow that leads to a Heap-Based Buffer Overflow in function CJBig2Image::expand() and results in a memory corruption that leads to code execution when parsing a crafted PDF book.

Is CVE-2021-30354 actively exploited?

Active exploitation of CVE-2021-30354 has not been confirmed. Its EPSS score was 8.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-30354?

CVE-2021-30354 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

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