CVE-2025-21435Network attack vector

Wi-Fi service interruption via unchecked beacon length

Published Apr 7, 2025 · Updated Apr 7, 2025

Buffer over-read in Qualcomm Snapdragon WLAN firmware allows remote attackers to interrupt Wi-Fi service via a crafted beacon. The util_gen_new_ie function in wlan_scan_utils_api.c parses an extended information element without sufficient length checks, allowing an out-of-bounds read during beacon handling. An unauthenticated transmitter able to deliver the malformed wireless beacon can cause a transient service interruption, with no published confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability0.26%
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 WLAN firmware allows remote attackers to interrupt Wi-Fi service via a crafted beacon. The util_gen_new_ie function in wlan_scan_utils_api.c parses an extended information element without sufficient length checks, allowing an out-of-bounds read during beacon handling. An unauthenticated transmitter able to deliver the malformed wireless beacon can cause a transient service interruption, with no published confidentiality or integrity impact.

The record

CVE
CVE-2025-21435
Published
Apr 7, 2025
Updated
Apr 7, 2025
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-126, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=AR8035
  2. Affected versionversion=CSR8811
  3. Affected versionversion=FastConnect 6800
  4. Affected versionversion=FastConnect 6900
  5. Affected versionversion=FastConnect 7800
  6. Affected versionversion=Immersive Home 214 Platform
  7. Affected versionversion=Immersive Home 216 Platform
  8. Affected versionversion=Immersive Home 316 Platform
  9. Affected versionversion=Immersive Home 318 Platform
  10. Affected versionversion=Immersive Home 3210 Platform
  11. Affected versionversion=Immersive Home 326 Platform
  12. Affected versionversion=IPQ5010
  13. Affected versionversion=IPQ5028
  14. Affected versionversion=IPQ5300
  15. Affected versionversion=IPQ5302
  16. Affected versionversion=IPQ5312
  17. Affected versionversion=IPQ5332
  18. Affected versionversion=IPQ6000
  19. Affected versionversion=IPQ6010
  20. Affected versionversion=IPQ6018
  21. Affected versionversion=IPQ6028
  22. Affected versionversion=IPQ8070A
  23. Affected versionversion=IPQ8071A
  24. Affected versionversion=IPQ8072A
  25. Affected versionversion=IPQ8074A
  26. Affected versionversion=IPQ8076
  27. Affected versionversion=IPQ8076A
  28. Affected versionversion=IPQ8078
  29. Affected versionversion=IPQ8078A
  30. Affected versionversion=IPQ8173
  31. Affected versionversion=IPQ8174
  32. Affected versionversion=IPQ9008
  33. Affected versionversion=IPQ9048
  34. Affected versionversion=IPQ9554
  35. Affected versionversion=IPQ9570
  36. Affected versionversion=IPQ9574
  37. Affected versionversion=QAM8255P
  38. Affected versionversion=QAM8650P
  39. Affected versionversion=QAM8775P
  40. Affected versionversion=QCA4024
  41. Affected versionversion=QCA6391
  42. Affected versionversion=QCA6421
  43. Affected versionversion=QCA6426
  44. Affected versionversion=QCA6431
  45. Affected versionversion=QCA6436
  46. Affected versionversion=QCA6554A
  47. Affected versionversion=QCA6564AU
  48. Affected versionversion=QCA6574
  49. Affected versionversion=QCA6574A
  50. Affected versionversion=QCA6574AU
  51. Affected versionversion=QCA6584AU
  52. Affected versionversion=QCA6595
  53. Affected versionversion=QCA6595AU
  54. Affected versionversion=QCA6678AQ
  55. Affected versionversion=QCA6696
  56. Affected versionversion=QCA6698AQ
  57. Affected versionversion=QCA6777AQ
  58. Affected versionversion=QCA6787AQ
  59. Affected versionversion=QCA6797AQ
  60. Affected versionversion=QCA8075
  61. Affected versionversion=QCA8081
  62. Affected versionversion=QCA8082
  63. Affected versionversion=QCA8084
  64. Affected versionversion=QCA8085
  65. Affected versionversion=QCA8337
  66. Affected versionversion=QCA8386
  67. Affected versionversion=QCA9888
  68. Affected versionversion=QCA9889
  69. Affected versionversion=QCC2073
  70. Affected versionversion=QCC2076
  71. Affected versionversion=QCC710
  72. Affected versionversion=QCF8000
  73. Affected versionversion=QCF8000SFP
  74. Affected versionversion=QCF8001
  75. Affected versionversion=QCN5022
  76. Affected versionversion=QCN5024
  77. Affected versionversion=QCN5052
  78. Affected versionversion=QCN5122
  79. Affected versionversion=QCN5124
  80. Affected versionversion=QCN5152
  81. Affected versionversion=QCN5154
  82. Affected versionversion=QCN5164
  83. Affected versionversion=QCN6023
  84. Affected versionversion=QCN6024
  85. Affected versionversion=QCN6112
  86. Affected versionversion=QCN6122
  87. Affected versionversion=QCN6132
  88. Affected versionversion=QCN6224
  89. Affected versionversion=QCN6274
  90. Affected versionversion=QCN6402
  91. Affected versionversion=QCN6412
  92. Affected versionversion=QCN6422
  93. Affected versionversion=QCN6432
  94. Affected versionversion=QCN9000
  95. Affected versionversion=QCN9012
  96. Affected versionversion=QCN9022
  97. Affected versionversion=QCN9024
  98. Affected versionversion=QCN9070
  99. Affected versionversion=QCN9072
  100. Affected versionversion=QCN9074
  101. Affected versionversion=QCN9100
  102. Affected versionversion=QCN9160
  103. Affected versionversion=QCN9274
  104. Affected versionversion=QFW7114
  105. Affected versionversion=QFW7124
  106. Affected versionversion=QMP1000
  107. Affected versionversion=QXM8083
  108. Affected versionversion=SA6155P
  109. Affected versionversion=SA8155P
  110. Affected versionversion=SA8195P
  111. Affected versionversion=SDX55
  112. Affected versionversion=SDX65M
  113. Affected versionversion=SM8735
  114. Affected versionversion=SM8750
  115. Affected versionversion=SM8750P
  116. Affected versionversion=Snapdragon 865 5G Mobile Platform
  117. Affected versionversion=Snapdragon 865+ 5G Mobile Platform (SM8250-AB)
  118. Affected versionversion=Snapdragon 870 5G Mobile Platform (SM8250-AC)
  119. Affected versionversion=Snapdragon 8 Gen 3 Mobile Platform
  120. Affected versionversion=Snapdragon X55 5G Modem-RF System
  121. Affected versionversion=Snapdragon X65 5G Modem-RF System
  122. Affected versionversion=Snapdragon X72 5G Modem-RF System
  123. Affected versionversion=Snapdragon X75 5G Modem-RF System
  124. Affected versionversion=SW5100
  125. Affected versionversion=SW5100P
  126. Affected versionversion=SXR2330P
  127. Affected versionversion=WCD9340
  128. Affected versionversion=WCD9378
  129. Affected versionversion=WCD9380
  130. Affected versionversion=WCD9385
  131. Affected versionversion=WCD9390
  132. Affected versionversion=WCD9395
  133. Affected versionversion=WCN3980
  134. Affected versionversion=WCN3988
  135. Affected versionversion=WCN6450
  136. Affected versionversion=WCN6755
  137. Affected versionversion=WCN7750
  138. Affected versionversion=WCN7860
  139. Affected versionversion=WCN7861
  140. Affected versionversion=WCN7880
  141. Affected versionversion=WCN7881
  142. Affected versionversion=WSA8810
  143. Affected versionversion=WSA8815
  144. Affected versionversion=WSA8830
  145. Affected versionversion=WSA8832
  146. Affected versionversion=WSA8835
  147. Affected versionversion=WSA8840
  148. Affected versionversion=WSA8845
  149. Affected versionversion=WSA8845H

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=AR8035; version=CSR8811; version=FastConnect 6800; version=FastConnect 6900; version=FastConnect 7800; version=Immersive Home 214 Platform; version=Immersive Home 216 Platform; version=Immersive Home 316 Platform; version=Immersive Home 318 Platform; version=Immersive Home 3210 Platform; version=Immersive Home 326 Platform; version=IPQ5010; version=IPQ5028; version=IPQ5300; version=IPQ5302; version=IPQ5312; version=IPQ5332; version=IPQ6000; version=IPQ6010; version=IPQ6018; version=IPQ6028; version=IPQ8070A; version=IPQ8071A; version=IPQ8072A; version=IPQ8074A; version=IPQ8076; version=IPQ8076A; version=IPQ8078; version=IPQ8078A; version=IPQ8173; version=IPQ8174; version=IPQ9008; version=IPQ9048; version=IPQ9554; version=IPQ9570; version=IPQ9574; version=QAM8255P; version=QAM8650P; version=QAM8775P; version=QCA4024; version=QCA6391; version=QCA6421; version=QCA6426; version=QCA6431; version=QCA6436; version=QCA6554A; version=QCA6564AU; version=QCA6574; version=QCA6574A; version=QCA6574AU; version=QCA6584AU; version=QCA6595; version=QCA6595AU; version=QCA6678AQ; version=QCA6696; version=QCA6698AQ; version=QCA6777AQ; version=QCA6787AQ; version=QCA6797AQ; version=QCA8075; version=QCA8081; version=QCA8082; version=QCA8084; version=QCA8085; version=QCA8337; version=QCA8386; version=QCA9888; version=QCA9889; version=QCC2073; version=QCC2076; version=QCC710; version=QCF8000; version=QCF8000SFP; version=QCF8001; version=QCN5022; version=QCN5024; version=QCN5052; version=QCN5122; version=QCN5124; version=QCN5152; version=QCN5154; version=QCN5164; version=QCN6023; version=QCN6024; version=QCN6112; version=QCN6122; version=QCN6132; version=QCN6224; version=QCN6274; version=QCN6402; version=QCN6412; version=QCN6422; version=QCN6432; version=QCN9000; version=QCN9012; version=QCN9022; version=QCN9024; version=QCN9070; version=QCN9072; version=QCN9074; version=QCN9100; version=QCN9160; version=QCN9274; version=QFW7114; version=QFW7124; version=QMP1000; version=QXM8083; version=SA6155P; version=SA8155P; version=SA8195P; version=SDX55; version=SDX65M; version=SM8735; version=SM8750; version=SM8750P; version=Snapdragon 865 5G Mobile Platform; version=Snapdragon 865+ 5G Mobile Platform (SM8250-AB); version=Snapdragon 870 5G Mobile Platform (SM8250-AC); version=Snapdragon 8 Gen 3 Mobile Platform; version=Snapdragon X55 5G Modem-RF System; version=Snapdragon X65 5G Modem-RF System; version=Snapdragon X72 5G Modem-RF System; version=Snapdragon X75 5G Modem-RF System; version=SW5100; version=SW5100P; version=SXR2330P; version=WCD9340; version=WCD9378; version=WCD9380; version=WCD9385; version=WCD9390; version=WCD9395; version=WCN3980; version=WCN3988; version=WCN6450; version=WCN6755; version=WCN7750; version=WCN7860; version=WCN7861; version=WCN7880; version=WCN7881; version=WSA8810; version=WSA8815; version=WSA8830; version=WSA8832; version=WSA8835; version=WSA8840; version=WSA8845; version=WSA8845H

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 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-126Buffer Over-read
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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