Service crash via unbounded Base64 decode
Published Jun 8, 2026 · Updated Jun 8, 2026
Stack overflow in Tenda HG10 firmware 300001138_en_xpon allows remote authenticated users to crash the Boa management service. The formPPPEdit handler passes the encodename request value to data_base64decode, which writes into stack buffer v31 without an output-length bound. The request must set save to a nonempty value and item to 0; the proof-of-concept report states that authentication is unnecessary, although the CNA scores the flaw as requiring low privileges.
Summary
What happened
Stack overflow in Tenda HG10 firmware 300001138_en_xpon allows remote authenticated users to crash the Boa management service. The formPPPEdit handler passes the encodename request value to data_base64decode, which writes into stack buffer v31 without an output-length bound. The request must set save to a nonempty value and item to 0; the proof-of-concept report states that authentication is unnecessary, although the CNA scores the flaw as requiring low privileges.
The record
- CVE
- CVE-2026-11553
- Published
- Jun 8, 2026
- Updated
- Jun 8, 2026
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- HG10
- Classifications
- CWE-119, CWE-121, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 8, 2026CVE publishedPublication date reported by the CVE source.
- Jun 8, 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=300001138_en_xpon
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
- TENDA HG10 formPPPEdit proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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