CVE-2020-11171Network attack vector

Memory disclosure and service interruption via unterminated SDP

Published Mar 17, 2021 · Updated Aug 4, 2024

A buffer over-read in Qualcomm Snapdragon Data Modem firmware allows remote attackers to disclose memory or interrupt service through received SDP values. The modem parser searches received SDP data for a NUL terminator without first ensuring that one exists within the supplied buffer, so the read continues past its boundary. Network delivery of a malformed SDP value requires no authentication or user interaction and exposes adjacent memory or disrupts modem availability.

CVSS severity8.2
High
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A buffer over-read in Qualcomm Snapdragon Data Modem firmware allows remote attackers to disclose memory or interrupt service through received SDP values. The modem parser searches received SDP data for a NUL terminator without first ensuring that one exists within the supplied buffer, so the read continues past its boundary. Network delivery of a malformed SDP value requires no authentication or user interaction and exposes adjacent memory or disrupts modem availability.

The record

CVE
CVE-2020-11171
Published
Mar 17, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-126, T1499
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

8.2Qualcomm Technologies, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
9.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

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-126Buffer Over-read
T1499Endpoint Denial of Service

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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