Session auth bypass via cookie value in T-Mobile 5G Box IDU routers
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| WNC | T-Mobile 5G Box IDU | unaffected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Wnc | T-mobile 5g Box Idu |
|
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.319% probability within 30 days)
| Link | Providers |
|---|---|
| https://cert.pl/posts/2026/09/CVE-2026-40854 |
|
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Description | WNC T-Mobile 5G Box IDU router contains an authentication bypass vulnerability in the portal.cgi component. The session verification mechanism improperly validates the sessionid cookie by checking for the existence of a corresponding file in /tmp/login_user. An attacker can bypass authentication by using directory entries such as "." or ".." in the cookie, allowing unauthorized access to the administration panel.This issue has been fixed in firmware version 1.1.0.651412 | |
| Title | Session auth bypass via cookie value in T-Mobile 5G Box IDU routers | |
| First Time appeared |
Wnc
Wnc t-mobile 5g Box Idu |
|
| Weaknesses | CWE-290 | |
| CPEs | cpe:2.3:a:wnc:t-mobile_5g_box_idu:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Wnc
Wnc t-mobile 5g Box Idu |
|
| References |
| |
| Metrics |
cvssV4_0
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