CVE-2020-11226Network attack vector

Memory disclosure via unchecked modem unpacking offset

Published Mar 17, 2021 · Updated Aug 4, 2024

Out-of-bounds read in Qualcomm Snapdragon Data Modem firmware allows remote attackers to disclose memory through crafted packed data. The closed-source unpacking logic uses an attacker-controlled offset without verifying that the requested length remains inside the input buffer. Network access to an affected modem is sufficient; exposed bytes can reveal adjacent modem memory without altering data or interrupting service.

CVSS severity7.5
High
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Qualcomm Snapdragon Data Modem firmware allows remote attackers to disclose memory through crafted packed data. The closed-source unpacking logic uses an attacker-controlled offset without verifying that the requested length remains inside the input buffer. Network access to an affected modem is sufficient; exposed bytes can reveal adjacent modem memory without altering data or interrupting service.

The record

CVE
CVE-2020-11226
Published
Mar 17, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-129
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 17, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index

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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