Service interruption via ADD TS buffer over-read
Published Apr 7, 2025 · Updated Feb 26, 2026
Buffer over-read in Qualcomm Snapdragon WLAN Host allows remote attackers to interrupt service through a crafted ADD TS request. The WLAN host processes the access point's ADD TS request while a station is associating and establishing a TSpec session, then reads beyond the request buffer. A malicious or compromised access point must deliver the request as an affected chipset connects; the documented consequence is loss of availability, not data disclosure or modification.
Summary
What happened
Buffer over-read in Qualcomm Snapdragon WLAN Host allows remote attackers to interrupt service through a crafted ADD TS request. The WLAN host processes the access point's ADD TS request while a station is associating and establishing a TSpec session, then reads beyond the request buffer. A malicious or compromised access point must deliver the request as an affected chipset connects; the documented consequence is loss of availability, not data disclosure or modification.
The record
- CVE
- CVE-2025-21428
- Published
- Apr 7, 2025
- Updated
- Feb 26, 2026
- Vendor
- Qualcomm
- Product
- Snapdragon
- Classifications
- CWE-126, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 7, 2025CVE publishedPublication date reported by the CVE source.
- Feb 26, 2026Record 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.
- Affected versionversion=9206 LTE Modem
- Affected versionversion=APQ8017
- Affected versionversion=AR8031
- Affected versionversion=CSRA6620
- Affected versionversion=CSRA6640
- Affected versionversion=C-V2X 9150
- Affected versionversion=FastConnect 6200
- Affected versionversion=FastConnect 6900
- Affected versionversion=MDM9250
- Affected versionversion=MDM9628
- Affected versionversion=MDM9640
- Affected versionversion=MDM9650
- Affected versionversion=MSM8996AU
- Affected versionversion=QCA6174
- Affected versionversion=QCA6174A
- Affected versionversion=QCA6175A
- Affected versionversion=QCA6554A
- Affected versionversion=QCA6564A
- Affected versionversion=QCA6564AU
- Affected versionversion=QCA6574
- Affected versionversion=QCA6574A
- Affected versionversion=QCA6574AU
- Affected versionversion=QCA6584
- Affected versionversion=QCA6584AU
- Affected versionversion=QCA6595
- Affected versionversion=QCA6595AU
- Affected versionversion=QCA6696
- Affected versionversion=QCA9367
- Affected versionversion=QCA9377
- Affected versionversion=QCA9379
- Affected versionversion=QCM2150
- Affected versionversion=QEP8111
- Affected versionversion=Qualcomm 205 Mobile Platform
- Affected versionversion=Qualcomm 215 Mobile Platform
- Affected versionversion=SA2150P
- Affected versionversion=SD626
- Affected versionversion=SDM429W
- Affected versionversion=Smart Audio 200 Platform
- Affected versionversion=Smart Audio 400 Platform
- Affected versionversion=Smart Display 200 Platform (APQ5053-AA)
- Affected versionversion=Snapdragon 1200 Wearable Platform
- Affected versionversion=Snapdragon 210 Processor
- Affected versionversion=Snapdragon 212 Mobile Platform
- Affected versionversion=Snapdragon 425 Mobile Platform
- Affected versionversion=Snapdragon 429 Mobile Platform
- Affected versionversion=Snapdragon 439 Mobile Platform
- Affected versionversion=Snapdragon 625 Mobile Platform
- Affected versionversion=Snapdragon 626 Mobile Platform
- Affected versionversion=Snapdragon 632 Mobile Platform
- Affected versionversion=Snapdragon 820 Automotive Platform
- Affected versionversion=Snapdragon Auto 5G Modem-RF
- Affected versionversion=Snapdragon X12 LTE Modem
- Affected versionversion=Snapdragon X35 5G Modem-RF System
- Affected versionversion=Snapdragon X5 LTE Modem
- Affected versionversion=Vision Intelligence 100 Platform (APQ8053-AA)
- Affected versionversion=Vision Intelligence 200 Platform (APQ8053-AC)
- Affected versionversion=WCD9326
- Affected versionversion=WCD9330
- Affected versionversion=WCD9335
- Affected versionversion=WCD9340
- Affected versionversion=WCN3610
- Affected versionversion=WCN3615
- Affected versionversion=WCN3620
- Affected versionversion=WCN3660B
- Affected versionversion=WCN3680
- Affected versionversion=WCN3680B
- Affected versionversion=WCN3980
- Affected versionversion=WSA8810
- Affected versionversion=WSA8815
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Public exploit references
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Technologies
Your stack
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Your stack
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