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TI-2021-10851 Aliases CVE-2021-30354GHSA-66c4-8x32-4mx8

Integer overflow in Amazon Kindle e-reader

Priority MEDIUM 48CWE-680Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.08401 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Amazon Kindle e-readerAll versions prior to and including 5.13.4—No fix listedCNA
  • Amazon Kindle e-reader Vendor— Affected All versions prior to and including 5.13.4 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:amazon:kindle_firmware:*:*:*:*:*:*:*:*up to 5.13.4VulnerableAWS
cpe:2.3:h:amazon:kindle:-:*:*:*:*:*:*:*not specified by NVDRunning onAWS
  • cpe:2.3:o:amazon:kindle_firmware:*:*:*:*:*:*:*:* Versions up to 5.13.4 Vulnerable ·AWS
  • cpe:2.3:h:amazon:kindle:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AWS

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30354
  2. 2026-10-03 Alias added: GHSA-66c4-8x32-4mx8
  3. 2026-11-05 EPSS moved to the 95th–99th percentile

References

Exploit 1

  • TI-2021-10852 Improper privilege management in Amazon Kindle e-reader CVSS 3.1HIGH 8.6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences