Cyber Resilience

CVE-2021-46416

HighPublic PoC

Published: 07 April 2022

Published
07 April 2022
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS Score 0.0629 91.1th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-46416 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Sma Sunny Tripower Firmware. Its CVSS base score is 8.1 (High).

Operationally, ranked in the top 8.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

Insecure direct object reference in SUNNY TRIPOWER 5.0 Firmware version 3.10.16.R leads to unauthorized user groups accessing due to insecure cookie handling.

CWE(s)
CWE-639

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

sma
sunny tripower firmware
3.10.16.r

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

References