CVE-2023-33040Network attack vector

Modem service interruption via DTLS buffer over-read

Published Jan 2, 2024 · Updated Jun 3, 2025

Buffer over-read in Qualcomm Snapdragon Data Modem allows remote attackers to interrupt modem service through a crafted DTLS handshake. Qualcomm identifies the locus only as the Data Modem during DTLS handshaking and does not disclose the specific routine or unchecked length operation. Network access is sufficient, with no privileges or user interaction, and the documented consequence is a transient service interruption rather than data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.34%
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 Data Modem allows remote attackers to interrupt modem service through a crafted DTLS handshake. Qualcomm identifies the locus only as the Data Modem during DTLS handshaking and does not disclose the specific routine or unchecked length operation. Network access is sufficient, with no privileges or user interaction, and the documented consequence is a transient service interruption rather than data disclosure or modification.

The record

CVE
CVE-2023-33040
Published
Jan 2, 2024
Updated
Jun 3, 2025
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-126, T1642
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2025Record 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=315 5G IoT Modem
  2. Affected versionversion=AQT1000
  3. Affected versionversion=AR8035
  4. Affected versionversion=CSRA6620
  5. Affected versionversion=CSRA6640
  6. Affected versionversion=CSRB31024
  7. Affected versionversion=FastConnect 6200
  8. Affected versionversion=FastConnect 6700
  9. Affected versionversion=FastConnect 6800
  10. Affected versionversion=FastConnect 6900
  11. Affected versionversion=FastConnect 7800
  12. Affected versionversion=QCA6174A
  13. Affected versionversion=QCA6391
  14. Affected versionversion=QCA6420
  15. Affected versionversion=QCA6421
  16. Affected versionversion=QCA6426
  17. Affected versionversion=QCA6430
  18. Affected versionversion=QCA6431
  19. Affected versionversion=QCA6436
  20. Affected versionversion=QCA6564AU
  21. Affected versionversion=QCA6574A
  22. Affected versionversion=QCA6574AU
  23. Affected versionversion=QCA6595AU
  24. Affected versionversion=QCA6696
  25. Affected versionversion=QCA6698AQ
  26. Affected versionversion=QCA8081
  27. Affected versionversion=QCA8337
  28. Affected versionversion=QCA9377
  29. Affected versionversion=QCM2290
  30. Affected versionversion=QCM4290
  31. Affected versionversion=QCM4325
  32. Affected versionversion=QCM4490
  33. Affected versionversion=QCM6125
  34. Affected versionversion=QCM6490
  35. Affected versionversion=QCN6024
  36. Affected versionversion=QCN9024
  37. Affected versionversion=QCS2290
  38. Affected versionversion=QCS410
  39. Affected versionversion=QCS4290
  40. Affected versionversion=QCS4490
  41. Affected versionversion=QCS610
  42. Affected versionversion=QCS6125
  43. Affected versionversion=QCS6490
  44. Affected versionversion=QCS8550
  45. Affected versionversion=SA6145P
  46. Affected versionversion=SA6150P
  47. Affected versionversion=SA6155
  48. Affected versionversion=SA6155P
  49. Affected versionversion=SA8145P
  50. Affected versionversion=SA8150P
  51. Affected versionversion=SA8155
  52. Affected versionversion=SA8155P
  53. Affected versionversion=SA8195P
  54. Affected versionversion=SC8180X+SDX55
  55. Affected versionversion=SD460
  56. Affected versionversion=SD662
  57. Affected versionversion=SD675
  58. Affected versionversion=SD 675
  59. Affected versionversion=SD730
  60. Affected versionversion=SD855
  61. Affected versionversion=SD865 5G
  62. Affected versionversion=SD888
  63. Affected versionversion=SDX55
  64. Affected versionversion=SDX57M
  65. Affected versionversion=SG4150P
  66. Affected versionversion=SM4450
  67. Affected versionversion=SM6250
  68. Affected versionversion=SM6250P
  69. Affected versionversion=SM7250P
  70. Affected versionversion=SM7315
  71. Affected versionversion=SM7325P
  72. Affected versionversion=Smart Audio 400 Platform
  73. Affected versionversion=Snapdragon 460 Mobile Platform
  74. Affected versionversion=Snapdragon 480 5G Mobile Platform
  75. Affected versionversion=Snapdragon 480+ 5G Mobile Platform (SM4350-AC)
  76. Affected versionversion=Snapdragon 4 Gen 1 Mobile Platform
  77. Affected versionversion=Snapdragon 662 Mobile Platform
  78. Affected versionversion=Snapdragon 665 Mobile Platform
  79. Affected versionversion=Snapdragon 675 Mobile Platform
  80. Affected versionversion=Snapdragon 678 Mobile Platform (SM6150-AC)
  81. Affected versionversion=Snapdragon 680 4G Mobile Platform
  82. Affected versionversion=Snapdragon 685 4G Mobile Platform (SM6225-AD)
  83. Affected versionversion=Snapdragon 690 5G Mobile Platform
  84. Affected versionversion=Snapdragon 695 5G Mobile Platform
  85. Affected versionversion=Snapdragon 720G Mobile Platform
  86. Affected versionversion=Snapdragon 730G Mobile Platform (SM7150-AB)
  87. Affected versionversion=Snapdragon 730 Mobile Platform (SM7150-AA)
  88. Affected versionversion=Snapdragon 732G Mobile Platform (SM7150-AC)
  89. Affected versionversion=Snapdragon 750G 5G Mobile Platform
  90. Affected versionversion=Snapdragon 765 5G Mobile Platform (SM7250-AA)
  91. Affected versionversion=Snapdragon 765G 5G Mobile Platform (SM7250-AB)
  92. Affected versionversion=Snapdragon 768G 5G Mobile Platform (SM7250-AC)
  93. Affected versionversion=Snapdragon 778G 5G Mobile Platform
  94. Affected versionversion=Snapdragon 778G+ 5G Mobile Platform (SM7325-AE)
  95. Affected versionversion=Snapdragon 780G 5G Mobile Platform
  96. Affected versionversion=Snapdragon 782G Mobile Platform (SM7325-AF)
  97. Affected versionversion=Snapdragon 7c Compute Platform (SC7180-AC)
  98. Affected versionversion=Snapdragon 7c Gen 2 Compute Platform (SC7180-AD) "Rennell Pro"
  99. Affected versionversion=Snapdragon 7c+ Gen 3 Compute
  100. Affected versionversion=Snapdragon 855+/860 Mobile Platform (SM8150-AC)
  101. Affected versionversion=Snapdragon 855 Mobile Platform
  102. Affected versionversion=Snapdragon 865 5G Mobile Platform
  103. Affected versionversion=Snapdragon 865+ 5G Mobile Platform (SM8250-AB)
  104. Affected versionversion=Snapdragon 870 5G Mobile Platform (SM8250-AC)
  105. Affected versionversion=Snapdragon 888 5G Mobile Platform
  106. Affected versionversion=Snapdragon 888+ 5G Mobile Platform (SM8350-AC)
  107. Affected versionversion=Snapdragon 8c Compute Platform (SC8180X-AD) "Poipu Lite"
  108. Affected versionversion=Snapdragon 8c Compute Platform (SC8180XP-AD) "Poipu Lite"
  109. Affected versionversion=Snapdragon 8cx Compute Platform (SC8180X-AA, AB)
  110. Affected versionversion=Snapdragon 8cx Compute Platform (SC8180XP-AC, AF) "Poipu Pro"
  111. Affected versionversion=Snapdragon 8cx Gen 2 5G Compute Platform (SC8180X-AC, AF) "Poipu Pro"
  112. Affected versionversion=Snapdragon 8cx Gen 2 5G Compute Platform (SC8180XP-AA, AB)
  113. Affected versionversion=Snapdragon 8 Gen 1 Mobile Platform
  114. Affected versionversion=Snapdragon 8+ Gen 1 Mobile Platform
  115. Affected versionversion=Snapdragon Auto 4G Modem
  116. Affected versionversion=Snapdragon Auto 5G Modem-RF
  117. Affected versionversion=Snapdragon W5+ Gen 1 Wearable Platform
  118. Affected versionversion=Snapdragon X24 LTE Modem
  119. Affected versionversion=Snapdragon X50 5G Modem-RF System
  120. Affected versionversion=Snapdragon X55 5G Modem-RF System
  121. Affected versionversion=Snapdragon X65 5G Modem-RF System
  122. Affected versionversion=Snapdragon X70 Modem-RF System
  123. Affected versionversion=Snapdragon XR2 5G Platform
  124. Affected versionversion=SW5100
  125. Affected versionversion=SW5100P
  126. Affected versionversion=SXR2130
  127. Affected versionversion=WCD9326
  128. Affected versionversion=WCD9335
  129. Affected versionversion=WCD9340
  130. Affected versionversion=WCD9341
  131. Affected versionversion=WCD9360
  132. Affected versionversion=WCD9370
  133. Affected versionversion=WCD9371
  134. Affected versionversion=WCD9375
  135. Affected versionversion=WCD9380
  136. Affected versionversion=WCD9385
  137. Affected versionversion=WCN3910
  138. Affected versionversion=WCN3950
  139. Affected versionversion=WCN3980
  140. Affected versionversion=WCN3988
  141. Affected versionversion=WCN3990
  142. Affected versionversion=WCN6740
  143. Affected versionversion=WSA8810
  144. Affected versionversion=WSA8815
  145. Affected versionversion=WSA8830
  146. Affected versionversion=WSA8832
  147. Affected versionversion=WSA8835

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=315 5G IoT Modem; version=AQT1000; version=AR8035; version=CSRA6620; version=CSRA6640; version=CSRB31024; version=FastConnect 6200; version=FastConnect 6700; version=FastConnect 6800; version=FastConnect 6900; version=FastConnect 7800; version=QCA6174A; version=QCA6391; version=QCA6420; version=QCA6421; version=QCA6426; version=QCA6430; version=QCA6431; version=QCA6436; version=QCA6564AU; version=QCA6574A; version=QCA6574AU; version=QCA6595AU; version=QCA6696; version=QCA6698AQ; version=QCA8081; version=QCA8337; version=QCA9377; version=QCM2290; version=QCM4290; version=QCM4325; version=QCM4490; version=QCM6125; version=QCM6490; version=QCN6024; version=QCN9024; version=QCS2290; version=QCS410; version=QCS4290; version=QCS4490; version=QCS610; version=QCS6125; version=QCS6490; version=QCS8550; version=SA6145P; version=SA6150P; version=SA6155; version=SA6155P; version=SA8145P; version=SA8150P; version=SA8155; version=SA8155P; version=SA8195P; version=SC8180X+SDX55; version=SD460; version=SD662; version=SD675; version=SD 675; version=SD730; version=SD855; version=SD865 5G; version=SD888; version=SDX55; version=SDX57M; version=SG4150P; version=SM4450; version=SM6250; version=SM6250P; version=SM7250P; version=SM7315; version=SM7325P; version=Smart Audio 400 Platform; version=Snapdragon 460 Mobile Platform; version=Snapdragon 480 5G Mobile Platform; version=Snapdragon 480+ 5G Mobile Platform (SM4350-AC); version=Snapdragon 4 Gen 1 Mobile Platform; version=Snapdragon 662 Mobile Platform; version=Snapdragon 665 Mobile Platform; version=Snapdragon 675 Mobile Platform; version=Snapdragon 678 Mobile Platform (SM6150-AC); version=Snapdragon 680 4G Mobile Platform; version=Snapdragon 685 4G Mobile Platform (SM6225-AD); version=Snapdragon 690 5G Mobile Platform; version=Snapdragon 695 5G Mobile Platform; version=Snapdragon 720G Mobile Platform; version=Snapdragon 730G Mobile Platform (SM7150-AB); version=Snapdragon 730 Mobile Platform (SM7150-AA); version=Snapdragon 732G Mobile Platform (SM7150-AC); version=Snapdragon 750G 5G Mobile Platform; version=Snapdragon 765 5G Mobile Platform (SM7250-AA); version=Snapdragon 765G 5G Mobile Platform (SM7250-AB); version=Snapdragon 768G 5G Mobile Platform (SM7250-AC); version=Snapdragon 778G 5G Mobile Platform; version=Snapdragon 778G+ 5G Mobile Platform (SM7325-AE); version=Snapdragon 780G 5G Mobile Platform; version=Snapdragon 782G Mobile Platform (SM7325-AF); version=Snapdragon 7c Compute Platform (SC7180-AC); version=Snapdragon 7c Gen 2 Compute Platform (SC7180-AD) "Rennell Pro"; version=Snapdragon 7c+ Gen 3 Compute; version=Snapdragon 855+/860 Mobile Platform (SM8150-AC); version=Snapdragon 855 Mobile Platform; version=Snapdragon 865 5G Mobile Platform; version=Snapdragon 865+ 5G Mobile Platform (SM8250-AB); version=Snapdragon 870 5G Mobile Platform (SM8250-AC); version=Snapdragon 888 5G Mobile Platform; version=Snapdragon 888+ 5G Mobile Platform (SM8350-AC); version=Snapdragon 8c Compute Platform (SC8180X-AD) "Poipu Lite"; version=Snapdragon 8c Compute Platform (SC8180XP-AD) "Poipu Lite"; version=Snapdragon 8cx Compute Platform (SC8180X-AA, AB); version=Snapdragon 8cx Compute Platform (SC8180XP-AC, AF) "Poipu Pro"; version=Snapdragon 8cx Gen 2 5G Compute Platform (SC8180X-AC, AF) "Poipu Pro"; version=Snapdragon 8cx Gen 2 5G Compute Platform (SC8180XP-AA, AB); version=Snapdragon 8 Gen 1 Mobile Platform; version=Snapdragon 8+ Gen 1 Mobile Platform; version=Snapdragon Auto 4G Modem; version=Snapdragon Auto 5G Modem-RF; version=Snapdragon W5+ Gen 1 Wearable Platform; version=Snapdragon X24 LTE Modem; version=Snapdragon X50 5G Modem-RF System; version=Snapdragon X55 5G Modem-RF System; version=Snapdragon X65 5G Modem-RF System; version=Snapdragon X70 Modem-RF System; version=Snapdragon XR2 5G Platform; version=SW5100; version=SW5100P; version=SXR2130; version=WCD9326; version=WCD9335; version=WCD9340; version=WCD9341; version=WCD9360; version=WCD9370; version=WCD9371; version=WCD9375; version=WCD9380; version=WCD9385; version=WCN3910; version=WCN3950; version=WCN3980; version=WCN3988; version=WCN3990; version=WCN6740; version=WSA8810; version=WSA8815; version=WSA8830; version=WSA8832; version=WSA8835

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

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
T1642Endpoint Denial of Service

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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