In Enterprise Networking Operating System (ENOS) in Lenovo and IBM RackSwitch and BladeCenter products, an authentication bypass known as "…

Published 8 y ago 2018-01-10 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.0

v3.0 · NVD

CISA KEV

not known exploited

EPSS

0.3%

percentile 19%

Public exploits

none known

In Enterprise Networking Operating System (ENOS) in Lenovo and IBM RackSwitch and BladeCenter products, an authentication bypass known as "HP Backdoor" was discovered during a Lenovo security audit in the serial console, Telnet, SSH, and Web interfaces. This bypass mechanism can be accessed when performing local authentication under specific circumstances. If exploited, admin-level access to the switch is granted.

Exploit prediction (EPSS)

0.27% probability of exploitation in the next 30 days, higher than 19% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	7.0	`CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`
NVD	2.0	6.2	`AV:L/AC:H/Au:N/C:C/I:C/A:C`

Affected products

Lenovo Group Ltd. Enterprise Network Operating System affecting Lenovo and IBM RackSwitch and BladeCenter Products

Classification

Weakness

CWE-287 Improper Authentication

References

support.lenovo.com /us/en/product_security/LEN-16095 · x_refsource_CONFIRM, x_transferred
securitytracker.com /id/1040296 · vdb-entry, x_refsource_SECTRACK, x_transferred

Sources

CVE List: CVE-2017-3765
NVD: CVE-2017-3765

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.