CVE-2023-21631Network attack vector

LTE security downgrade via command validation failure

Published Jul 4, 2023 · Updated Dec 5, 2024

Improper input validation in Qualcomm Snapdragon modems allows remote attackers to weaken LTE security via a network security-mode command. The LTE security-mode command handler accepts insufficiently validated network messages and applies a weaker security configuration. Exploitation requires access to the cellular signaling path and no user interaction; published impact is limited to connection integrity.

CVSS severity7.5
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Qualcomm Snapdragon modems allows remote attackers to weaken LTE security via a network security-mode command. The LTE security-mode command handler accepts insufficiently validated network messages and applies a weaker security configuration. Exploitation requires access to the cellular signaling path and no user interaction; published impact is limited to connection integrity.

The record

CVE
CVE-2023-21631
Published
Jul 4, 2023
Updated
Dec 5, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-20
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 5, 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=315 5G IoT Modem
  2. Affected versionversion=9205 LTE Modem
  3. Affected versionversion=APQ8017
  4. Affected versionversion=APQ8037
  5. Affected versionversion=AQT1000
  6. Affected versionversion=AR8035
  7. Affected versionversion=CSRA6620
  8. Affected versionversion=CSRA6640
  9. Affected versionversion=CSRB31024
  10. Affected versionversion=C-V2X 9150
  11. Affected versionversion=FastConnect 6200
  12. Affected versionversion=FastConnect 6700
  13. Affected versionversion=FastConnect 6800
  14. Affected versionversion=FastConnect 6900
  15. Affected versionversion=FastConnect 7800
  16. Affected versionversion=MDM9628
  17. Affected versionversion=MSM8108
  18. Affected versionversion=MSM8209
  19. Affected versionversion=MSM8608
  20. Affected versionversion=MSM8909W
  21. Affected versionversion=QCA4004
  22. Affected versionversion=QCA6174A
  23. Affected versionversion=QCA6391
  24. Affected versionversion=QCA6420
  25. Affected versionversion=QCA6421
  26. Affected versionversion=QCA6426
  27. Affected versionversion=QCA6430
  28. Affected versionversion=QCA6431
  29. Affected versionversion=QCA6436
  30. Affected versionversion=QCA6564A
  31. Affected versionversion=QCA6564AU
  32. Affected versionversion=QCA6574A
  33. Affected versionversion=QCA6574AU
  34. Affected versionversion=QCA6595AU
  35. Affected versionversion=QCA6696
  36. Affected versionversion=QCA6698AQ
  37. Affected versionversion=QCA8081
  38. Affected versionversion=QCA8337
  39. Affected versionversion=QCA9377
  40. Affected versionversion=QCM2290
  41. Affected versionversion=QCM4290
  42. Affected versionversion=QCM4325
  43. Affected versionversion=QCM4490
  44. Affected versionversion=QCM6490
  45. Affected versionversion=QCN6024
  46. Affected versionversion=QCN9024
  47. Affected versionversion=QCS2290
  48. Affected versionversion=QCS4290
  49. Affected versionversion=QCS4490
  50. Affected versionversion=QCS6490
  51. Affected versionversion=QCS8550
  52. Affected versionversion=QTS110
  53. Affected versionversion=Qualcomm 205 Mobile Platform
  54. Affected versionversion=Qualcomm 215 Mobile Platform
  55. Affected versionversion=Qualcomm Video Collaboration VC3 Platform
  56. Affected versionversion=SC8180X+SDX55
  57. Affected versionversion=SD 455
  58. Affected versionversion=SD660
  59. Affected versionversion=SD855
  60. Affected versionversion=SD865 5G
  61. Affected versionversion=SD888
  62. Affected versionversion=SDX55
  63. Affected versionversion=SDX57M
  64. Affected versionversion=SG4150P
  65. Affected versionversion=SM7250P
  66. Affected versionversion=SM7315
  67. Affected versionversion=SM7325P
  68. Affected versionversion=Smart Audio 200 Platform
  69. Affected versionversion=Smart Audio 400 Platform
  70. Affected versionversion=Snapdragon 208 Processor
  71. Affected versionversion=Snapdragon 210 Processor
  72. Affected versionversion=Snapdragon 212 Mobile Platform
  73. Affected versionversion=Snapdragon 425 Mobile Platform
  74. Affected versionversion=Snapdragon 429 Mobile Platform
  75. Affected versionversion=Snapdragon 430 Mobile Platform
  76. Affected versionversion=Snapdragon 439 Mobile Platform
  77. Affected versionversion=Snapdragon 460 Mobile Platform
  78. Affected versionversion=Snapdragon 480 5G Mobile Platform
  79. Affected versionversion=Snapdragon 480+ 5G Mobile Platform (SM4350-AC)
  80. Affected versionversion=Snapdragon 4 Gen 1 Mobile Platform
  81. Affected versionversion=Snapdragon 4 Gen 2 Mobile Platform
  82. Affected versionversion=Snapdragon 630 Mobile Platform
  83. Affected versionversion=Snapdragon 636 Mobile Platform
  84. Affected versionversion=Snapdragon 660 Mobile Platform
  85. Affected versionversion=Snapdragon 662 Mobile Platform
  86. Affected versionversion=Snapdragon 665 Mobile Platform
  87. Affected versionversion=Snapdragon 680 4G Mobile Platform
  88. Affected versionversion=Snapdragon 685 4G Mobile Platform (SM6225-AD)
  89. Affected versionversion=Snapdragon 690 5G Mobile Platform
  90. Affected versionversion=Snapdragon 695 5G Mobile Platform
  91. Affected versionversion=Snapdragon 750G 5G Mobile Platform
  92. Affected versionversion=Snapdragon 765 5G Mobile Platform (SM7250-AA)
  93. Affected versionversion=Snapdragon 765G 5G Mobile Platform (SM7250-AB)
  94. Affected versionversion=Snapdragon 768G 5G Mobile Platform (SM7250-AC)
  95. Affected versionversion=Snapdragon 778G 5G Mobile Platform
  96. Affected versionversion=Snapdragon 778G+ 5G Mobile Platform (SM7325-AE)
  97. Affected versionversion=Snapdragon 780G 5G Mobile Platform
  98. Affected versionversion=Snapdragon 782G Mobile Platform (SM7325-AF)
  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 Wear 1300 Platform
  119. Affected versionversion=Snapdragon Wear 2100 Platform
  120. Affected versionversion=Snapdragon Wear 2500 Platform
  121. Affected versionversion=Snapdragon Wear 3100 Platform
  122. Affected versionversion=Snapdragon X24 LTE Modem
  123. Affected versionversion=Snapdragon X50 5G Modem-RF System
  124. Affected versionversion=Snapdragon X55 5G Modem-RF System
  125. Affected versionversion=Snapdragon X65 5G Modem-RF System
  126. Affected versionversion=Snapdragon X70 Modem-RF System
  127. Affected versionversion=Snapdragon XR2 5G Platform
  128. Affected versionversion=SW5100
  129. Affected versionversion=SW5100P
  130. Affected versionversion=SXR2130
  131. Affected versionversion=WCD9306
  132. Affected versionversion=WCD9326
  133. Affected versionversion=WCD9335
  134. Affected versionversion=WCD9340
  135. Affected versionversion=WCD9341
  136. Affected versionversion=WCD9360
  137. Affected versionversion=WCD9370
  138. Affected versionversion=WCD9375
  139. Affected versionversion=WCD9380
  140. Affected versionversion=WCD9385
  141. Affected versionversion=WCN3610
  142. Affected versionversion=WCN3615
  143. Affected versionversion=WCN3620
  144. Affected versionversion=WCN3660B
  145. Affected versionversion=WCN3680B
  146. Affected versionversion=WCN3910
  147. Affected versionversion=WCN3950
  148. Affected versionversion=WCN3980
  149. Affected versionversion=WCN3988
  150. Affected versionversion=WCN3990
  151. Affected versionversion=WCN6740
  152. Affected versionversion=WSA8810
  153. Affected versionversion=WSA8815
  154. Affected versionversion=WSA8830
  155. Affected versionversion=WSA8832
  156. Affected versionversion=WSA8835

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=315 5G IoT Modem; version=9205 LTE Modem; version=APQ8017; version=APQ8037; version=AQT1000; version=AR8035; version=CSRA6620; version=CSRA6640; version=CSRB31024; version=C-V2X 9150; version=FastConnect 6200; version=FastConnect 6700; version=FastConnect 6800; version=FastConnect 6900; version=FastConnect 7800; version=MDM9628; version=MSM8108; version=MSM8209; version=MSM8608; version=MSM8909W; version=QCA4004; version=QCA6174A; version=QCA6391; version=QCA6420; version=QCA6421; version=QCA6426; version=QCA6430; version=QCA6431; version=QCA6436; version=QCA6564A; 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=QCM6490; version=QCN6024; version=QCN9024; version=QCS2290; version=QCS4290; version=QCS4490; version=QCS6490; version=QCS8550; version=QTS110; version=Qualcomm 205 Mobile Platform; version=Qualcomm 215 Mobile Platform; version=Qualcomm Video Collaboration VC3 Platform; version=SC8180X+SDX55; version=SD 455; version=SD660; version=SD855; version=SD865 5G; version=SD888; version=SDX55; version=SDX57M; version=SG4150P; version=SM7250P; version=SM7315; version=SM7325P; version=Smart Audio 200 Platform; version=Smart Audio 400 Platform; version=Snapdragon 208 Processor; version=Snapdragon 210 Processor; version=Snapdragon 212 Mobile Platform; version=Snapdragon 425 Mobile Platform; version=Snapdragon 429 Mobile Platform; version=Snapdragon 430 Mobile Platform; version=Snapdragon 439 Mobile 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 4 Gen 2 Mobile Platform; version=Snapdragon 630 Mobile Platform; version=Snapdragon 636 Mobile Platform; version=Snapdragon 660 Mobile Platform; version=Snapdragon 662 Mobile Platform; version=Snapdragon 665 Mobile Platform; 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 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+ 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 Wear 1300 Platform; version=Snapdragon Wear 2100 Platform; version=Snapdragon Wear 2500 Platform; version=Snapdragon Wear 3100 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=WCD9306; version=WCD9326; version=WCD9335; version=WCD9340; version=WCD9341; version=WCD9360; version=WCD9370; version=WCD9375; version=WCD9380; version=WCD9385; version=WCN3610; version=WCN3615; version=WCN3620; version=WCN3660B; version=WCN3680B; 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:H/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.

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-20Improper Input Validation

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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