Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-8170— ExtremeXOS Privilege Escalation via Symlink Following in File Utilities

Quick assessment

Affected
Extreme Networks Switch Engine (EXOS)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Extreme Networks Switch Engine是美国Extreme Networks公司的一款网络设备操作系统。 Extreme Networks Switch Engine 31.7.4之前版本、32.0.0至32.7.4.15之前版本、33.0.0至33.1.100之前版本和33.2.0至33.7.1之前版本存在后置链接漏洞，该漏洞源于ExtremeXOS (EXOS) shell环境中的mv、cp和rm文件处理工具未能安全规范化路径，导致符号链接可超出预期权限边界，具有低权限CLI访问

AI Predicted 8.1 Difficulty: Easy EPSS 0.56% · P45

Affected Version Matrix 4

VendorProduct Version RangeStatus
Extreme Networks Switch Engine (EXOS) < 31.7.4 affected
32.0.0< 32.7.4.15 affected
33.0.0< 33.1.100 affected
33.2.0< 33.7.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-8170

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ExtremeXOS Privilege Escalation via Symlink Following in File Utilities
Source: CVE Program / CVE List V5
Vulnerability Description
The mv, cp, and rm file utilities exposed within the ExtremeXOS (EXOS) shell environment fail to safely canonicalize paths and follow symbolic links outside of the intended privilege boundary. An attacker with low-privilege CLI access can create a symbolic link that references a privileged filesystem location and then invoke the affected utilities to read, modify, or replace security-critical files outside of their authorized scope. Under certain conditions, this may enable escalation to root-level access and persistent modification of the device software stack. Exploitation is possible remotely by an attacker holding a low-privilege account, or locally via the serial console. Extreme would like to thank Hadrien Barral (Université Gustave Eiffel) and Georges-Axel Jaloyan (French Ministry of the Interior) for responsible disclosure of their findings.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Extreme Networks Switch Engine 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Extreme Networks Switch Engine是美国Extreme Networks公司的一款网络设备操作系统。 Extreme Networks Switch Engine 31.7.4之前版本、32.0.0至32.7.4.15之前版本、33.0.0至33.1.100之前版本和33.2.0至33.7.1之前版本存在后置链接漏洞，该漏洞源于ExtremeXOS (EXOS) shell环境中的mv、cp和rm文件处理工具未能安全规范化路径，导致符号链接可超出预期权限边界，具有低权限CLI访问
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Extreme Networks Switch Engine (EXOS) 0 ~ 31.7.4 -

II. Public POCs for CVE-2026-8170

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-8170

请登录查看更多情报信息。

Other References for CVE-2026-8170 (1)

IV. Related Vulnerabilities

Same product: Switch Engine (EXOS)
Same vendor: Extreme Networks
Same weakness: CWE-59

V. Comments for CVE-2026-8170

No comments yet

Leave a comment