Unauthenticated memory corruption via unbounded deviceName formatting
Published Aug 20, 2025 · Updated Aug 20, 2025
Stack-based buffer overflow in Tenda AC6 firmware 15.03.06.23_multi allows remote attackers to corrupt memory via a crafted deviceName. The saveParentControlInfo handler passes deviceName to set_device_name, where sprintf writes it into the stack-based mib_value buffer without a length bound. The attacker must reach the router management endpoint; public evidence demonstrates memory corruption, not confirmed code execution.
Summary
What happened
Stack-based buffer overflow in Tenda AC6 firmware 15.03.06.23_multi allows remote attackers to corrupt memory via a crafted deviceName. The saveParentControlInfo handler passes deviceName to set_device_name, where sprintf writes it into the stack-based mib_value buffer without a length bound. The attacker must reach the router management endpoint; public evidence demonstrates memory corruption, not confirmed code execution.
The record
- CVE
- CVE-2025-55503
- Published
- Aug 20, 2025
- Updated
- Aug 20, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-121, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 20, 2025CVE publishedPublication date reported by the CVE source.
- Aug 20, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
Weakness, pattern, technique
Public exploit references
- saveParentControlInfo deviceName proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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