Authenticated cross-user access via manipulated username cookie
Published Apr 7, 2022 · Updated Jul 13, 2026
Authorization bypass in SMA SUNNY TRIPOWER 5.0 firmware 3.10.16.R allows remote authenticated users to access other users' resources. The web interface trusts the username field in the user443 cookie: the proof of concept keeps the session ID and role constant while replacing one numeric username with another. A valid low-privilege session is required, and the disclosed impact is cross-user access; the specific data and permitted actions are not identified.
Summary
What happened
Authorization bypass in SMA SUNNY TRIPOWER 5.0 firmware 3.10.16.R allows remote authenticated users to access other users' resources. The web interface trusts the username field in the user443 cookie: the proof of concept keeps the session ID and role constant while replacing one numeric username with another. A valid low-privilege session is required, and the disclosed impact is cross-user access; the specific data and permitted actions are not identified.
The record
- CVE
- CVE-2021-46416
- Published
- Apr 7, 2022
- Updated
- Jul 13, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-639, T0819
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 7, 2022CVE publishedPublication date reported by the CVE source.
- Jul 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- SAM SUNNY TRIPOWER 5.0 Insecure Direct Object Reference proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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