Communication disclosure and tampering via plaintext transmission
Published May 13, 2026 · Updated May 13, 2026
Cleartext transmission in KDDI あんしんフィルター for au before 4.9_b0003 allows man-in-the-middle attackers to read or alter communications. The vendor states only that the Android app transmits sensitive information in plaintext and has not identified the affected request, protocol, or data. Exploitation requires a network position that permits traffic interception; the reported impact is limited to disclosure or modification of app communications.
Summary
What happened
Cleartext transmission in KDDI あんしんフィルター for au before 4.9_b0003 allows man-in-the-middle attackers to read or alter communications. The vendor states only that the Android app transmits sensitive information in plaintext and has not identified the affected request, protocol, or data. Exploitation requires a network position that permits traffic interception; the reported impact is limited to disclosure or modification of app communications.
The record
- CVE
- CVE-2026-41281
- Published
- May 13, 2026
- Updated
- May 13, 2026
- Vendor
- KDDI Corporation
- Product
- あんしんフィルター for au
- Classifications
- CWE-319, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 13, 2026CVE publishedPublication date reported by the CVE source.
- May 13, 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?
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- Affected versionversion=prior to 4.9_b0003
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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