Ruijie Networks NBR Routers Unauthenticated Arbitrary File Upload via fileupload.php

published 2025-11-24 11 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-198992

cvss: 9.3; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits: 0; none known

Ruijie NBR series routers contain an unauthenticated arbitrary file upload vulnerability via /ddi/server/fileupload.php. The endpoint accepts attacker-supplied values in the name and uploadDir parameters and saves the provided multipart file content without adequate validation or sanitization of file type, path, or extension. A remote attacker can upload a crafted PHP file and then access it from the web root, resulting in arbitrary code execution in the context of the web service. Exploitation evidence was observed by the Shadowserver Foundation on 2025-01-14 UTC.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 11 mo ago (2025-11-24)

Exploit prediction

0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/ruijie/ruijie-nbr-fileupload.yaml referenced PoC, tagged "exploit" by a source, unverified
cn-sec.com https://cn-sec.com/archives/1995366.html referenced PoC, tagged "exploit" by a source, unverified
cnblogs.com https://www.cnblogs.com/Domren/articles/19093295 referenced PoC, tagged "exploit" by a source, unverified
rfk0z.github.io https://rfk0z.github.io/posts/Ruijie-NBR-router-fileupload-php-arbitrary-file-upload-vulnerability/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Beijing Star-Net Ruijie Network Technology Co., Ltd. NBR Series Routers

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

CVE List CVE-2023-7330
NVD CVE-2023-7330

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary