Is CVE-2026-3337 actively exploited?

No active exploitation of CVE-2026-3337 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3337 be exploited remotely?

Yes. CVE-2026-3337 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3337?

CVE-2026-3337 has a CVSS score of 5.9 (MEDIUM).

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MEDIUM

CVE-2026-3337

CWE-208Published: March 2, 2026· Updated: Mar 9, 2026

5.9

CVSS v3.1

EPSS:0.08%probability of exploitation in 30 daysPercentile:24.6th

Official Description

Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.

The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.

Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.

NVD Source

Technical Analysis

CVE-2026-3337 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 5.9.