Amazon AWS S3 Encryption Client for .NET up to 3.x risky encryption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Amazon AWS S3 Encryption Client for .NET up to 3.x. It has been classified as problematic. The affected element is an unknown function. The manipulation leads to risky encryption. This vulnerability is listed as CVE-2025-14759. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Amazon AWS S3 Encryption Client for .NET up to 3.x. It has been rated as problematic. This issue affects an unknown code block. The manipulation with an unknown input leads to a risky encryption vulnerability. Using CWE to declare the problem leads to CWE-327. The product uses a broken or risky cryptographic algorithm or protocol. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at aws.amazon.com. The identification of this vulnerability is CVE-2025-14759 since 12/16/2025. The exploitation is known to be difficult. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

Upgrading to version 4.0.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-203939). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (AMZN): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Risky encryption
CWE: CWE-327 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: AWS S3 Encryption Client for .NET 4.0.0

Timelineinfo

12/16/2025 CVE reserved
12/17/2025 +1 days Advisory disclosed
12/17/2025 +0 days VulDB entry created
12/20/2025 +3 days VulDB entry last update

Sourcesinfo

Advisory: AWS-2025-032
Status: Confirmed

CVE: CVE-2025-14759 (🔒)
GCVE (CVE): GCVE-0-2025-14759
GCVE (VulDB): GCVE-100-337013
EUVD: 🔒

Entryinfo

Created: 12/17/2025 21:23
Updated: 12/20/2025 08:39
Changes: 12/17/2025 21:23 (76), 12/17/2025 22:33 (1), 12/20/2025 08:39 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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