---
id: CVE-2026-6727
title: >-
  A timing side-channel vulnerability exists in the RSA OAEP decryption
  implementation
summary: >-
  A timing side-channel vulnerability exists in the RSA OAEP decryption
  implementation. A privileged local attacker with access to the TPM command
  interface may be able to exploit timing differences to recover information
  that could allow …
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-208
published: '2026-08-11'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T14:09:00.860'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-6727'
references:
  - url: 'https://trustedcomputinggroup.org/about/security/'
    label: cret@cert.org
  - url: >-
      https://trustedcomputinggroup.org/wp-content/uploads/Extended-vrt0010-11-guidance_V1.pdf
    label: cret@cert.org
  - url: >-
      https://trustedcomputinggroup.org/wp-content/uploads/VRT0011-Advisory_Final-1.pdf
    label: cret@cert.org
tags:
  - nvd
epss: 0.00152
epssPercentile: 0.0367
ingestedAt: '2026-09-08T15:33:26.952Z'
---

## Overview

A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to TPM-managed RSA keys, including the RSA Endorsement Key (EK), including import blobs, credential blobs, and session salts. Under certain conditions, this may also enable the forgery of TPM 2.0 attestations. Refer to TCGVRT0011.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.