CVE-2020-11266

QSEE information disclosure via unchecked image address

Published Jun 9, 2021 · Updated Aug 4, 2024

Buffer over-read in Qualcomm Snapdragon Wired Infrastructure and Networking allows local users to disclose protected QSEE information. WIN TZ firmware dereferences an image address before checking that the address falls within the permitted range, causing an out-of-bounds read. Local code execution on an affected chipset is required, and the documented consequence is QSEE information disclosure rather than data modification.

CVSS severity7.9
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer over-read in Qualcomm Snapdragon Wired Infrastructure and Networking allows local users to disclose protected QSEE information. WIN TZ firmware dereferences an image address before checking that the address falls within the permitted range, causing an out-of-bounds read. Local code execution on an affected chipset is required, and the documented consequence is QSEE information disclosure rather than data modification.

The record

CVE
CVE-2020-11266
Published
Jun 9, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-126, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.9QualcommCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
6.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-126Buffer Over-read
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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