What is CVE-2025-14759?

CVE-2025-14759 is a medium-severity vulnerability in Aws S3 Encryption Client For .Net, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 5.3/10. Published 2025-12-17.

How severe is CVE-2025-14759?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Aws S3 Encryption Client For .Net

CVE-2025-14759

Missing cryptographic key commitment in the Amazon S3 Encryption Client for .NET may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record. To mitigate this issue, upgrade Amazon S3 Encryption Client for .NET to version 3.2.0 or later.

Vulnerability class: POODLE (CVE-2014-3566)

EPSS: 0.001 (0.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Aws S3 Encryption Client For .Net — versions 3.2.0

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)

Frequently asked questions

What is CVE-2025-14759?: CVE-2025-14759 is a medium-severity vulnerability in Aws S3 Encryption Client For .Net, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 5.3/10. Published 2025-12-17.
How severe is CVE-2025-14759?: Medium severity. CVSS v3 base score is 5.3 out of 10.