CVE-2020-11274Network attack vector

Remote modem denial of service via configuration assertion

Published May 7, 2021 · Updated Aug 4, 2024

Reachable assertion in Qualcomm Snapdragon modem firmware allows remote attackers to interrupt service through an invalid configuration. The closed-source modem component accepts an invalid configuration and reaches an assertion instead of rejecting the input safely. No privileges or user interaction are required, and the documented consequence is availability loss without data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in Qualcomm Snapdragon modem firmware allows remote attackers to interrupt service through an invalid configuration. The closed-source modem component accepts an invalid configuration and reaches an assertion instead of rejecting the input safely. No privileges or user interaction are required, and the documented consequence is availability loss without data disclosure or modification.

The record

CVE
CVE-2020-11274
Published
May 7, 2021
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-617, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=AQT1000, CSRB31024, FSM10055, FSM10056, PM3003A, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM6350, PM640A, PM640L, PM640P, PM7150A, PM7150L, PM7250, PM7250B, PM8004, PM8005, PM8008, PM8009, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM8350, PM8350B, PM8350BH, PM8350C, PM855, PM855A, PM855B, PM855L, PM855P, PM8998, PMC1000H, PMI632, PMI8998, PMK8002, PMK8003, PMK8350, PMM855AU, PMR525, PMR735A, PMR735B, PMX24, PMX50, PMX55, PMX60, QAT3516, QAT3518, QAT3519, QAT3522, QAT3550, QAT3555, QAT5515, QAT5516, QAT5522, QAT5533, QAT5568, QBT1500, QBT2000, QCA6174A, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6564AU, QCA6574A, QCA6574AU, QCA6584AU, QCA6595AU, QCA6696, QCA8337, QCA9377, QCM6125, QCS410, QCS610, QCS6125, QDM2301, QDM2302, QDM2305, QDM2307, QDM2308, QDM2310, QDM3301, QDM4643, QDM4650, QDM5620, QDM5621, QDM5650, QDM5652, QDM5670, QDM5671, QDM5677, QDM5679, QET4100, QET4101, QET5100, QET5100M, QET6100, QET6110, QFS2530, QFS2580, QFS2608, QFS2630, ...[truncated*]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=AQT1000, CSRB31024, FSM10055, FSM10056, PM3003A, PM456, PM6125, PM6150, PM6150A, PM6150L, PM6250, PM6350, PM640A, PM640L, PM640P, PM7150A, PM7150L, PM7250, PM7250B, PM8004, PM8005, PM8008, PM8009, PM8150, PM8150A, PM8150B, PM8150C, PM8150L, PM8250, PM8350, PM8350B, PM8350BH, PM8350C, PM855, PM855A, PM855B, PM855L, PM855P, PM8998, PMC1000H, PMI632, PMI8998, PMK8002, PMK8003, PMK8350, PMM855AU, PMR525, PMR735A, PMR735B, PMX24, PMX50, PMX55, PMX60, QAT3516, QAT3518, QAT3519, QAT3522, QAT3550, QAT3555, QAT5515, QAT5516, QAT5522, QAT5533, QAT5568, QBT1500, QBT2000, QCA6174A, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6564AU, QCA6574A, QCA6574AU, QCA6584AU, QCA6595AU, QCA6696, QCA8337, QCA9377, QCM6125, QCS410, QCS610, QCS6125, QDM2301, QDM2302, QDM2305, QDM2307, QDM2308, QDM2310, QDM3301, QDM4643, QDM4650, QDM5620, QDM5621, QDM5650, QDM5652, QDM5670, QDM5671, QDM5677, QDM5679, QET4100, QET4101, QET5100, QET5100M, QET6100, QET6110, QFS2530, QFS2580, QFS2608, QFS2630, ...[truncated*]

Published CVSS scores

7.5Qualcomm, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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