Persistent Backdoor in Yarbo Firmware Exposes Sensitive Functions
CVE-2026-7413

7.2HIGH

Key Information:

Vendor

Yarbo

Status
Firmware
Vendor
CVE Published:
7 May 2026

What is CVE-2026-7413?

A severe security flaw has been identified in Yarbo firmware v2.3.9, featuring a hidden backdoor that grants unauthorized and remote access to privileged functionalities. This undocumented access point remains active even after factory resets and standard updates, making it particularly dangerous as it cannot be disabled through user-facing settings. This vulnerability poses significant risks, allowing potential attackers to exploit the functionality without authentication.

Affected Version(s)

Firmware 0 <= 2.3.9

References

https://github.com/Bin4ry/yarbo-nat-in-my-back-yard
third-party-advisory
https://takeonme.org/gcves/GCVE-1337-2026-000000000000000...
third-party-advisory

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Andreas Makris (aka Bin4ry)
todb of AHA!
.