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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-55728— Loytec LINX firmware: Stack-based Buffer Overflow in cmd_ipaddr_conflict

Quick assessment

Affected
Loytec LIP-ME20xC
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.

LOYTEC LIP-ME20xC是LOYTEC公司的一款工业路由器。 LOYTEC LIP-ME201C、L-INX、L-GATE、L-ROC、L-IOB、L-DALI、L-VIS和L-PAD 8.4.16及之前版本存在缓冲区错误漏洞，该漏洞源于 中的 存在基于栈的缓冲区溢出，可能导致 组成员通过过长的interface-name参数触发SUID-root进程中止或提升权限。

CVSS 3.8 · Low EPSS 0.16% · P5

Affected Version Matrix 8

VendorProduct Version RangeStatus
Loytec L-DALI ≤ 8.4.16 affected
Loytec L-GATE ≤ 8.4.16 affected
Loytec L-INX ≤ 8.4.16 affected
Loytec L-IOB ≤ 8.4.16 affected
Loytec L-PAD ≤ 8.4.16 affected
Loytec L-ROC ≤ 8.4.16 affected
Loytec L-VIS ≤ 8.4.16 affected
Loytec LIP-ME20xC ≤ 8.4.16 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-55728

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Loytec LINX firmware: Stack-based Buffer Overflow in cmd_ipaddr_conflict
Source: CVE Program / CVE List V5
Vulnerability Description
Stack-based Buffer Overflow (CWE-121) in `/usr/bin/ltsudo` `cmd_ipaddr_conflict` in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows a `superadmin`-group attacker to trigger a SUID-root process abort or potentially elevate privileges via an overly long interface-name argument.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
LOYTEC LIP-ME20xC 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LOYTEC LIP-ME20xC是LOYTEC公司的一款工业路由器。 LOYTEC LIP-ME201C、L-INX、L-GATE、L-ROC、L-IOB、L-DALI、L-VIS和L-PAD 8.4.16及之前版本存在缓冲区错误漏洞，该漏洞源于`/usr/bin/ltsudo`中的`cmd_ipaddr_conflict`存在基于栈的缓冲区溢出，可能导致`superadmin`组成员通过过长的interface-name参数触发SUID-root进程中止或提升权限。
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
Loytec LIP-ME20xC 0 ~ 8.4.16 -
Loytec L-INX 0 ~ 8.4.16 -
Loytec L-GATE 0 ~ 8.4.16 -
Loytec L-ROC 0 ~ 8.4.16 -
Loytec L-IOB 0 ~ 8.4.16 -
Loytec L-DALI 0 ~ 8.4.16 -
Loytec L-VIS 0 ~ 8.4.16 -
Loytec L-PAD 0 ~ 8.4.16 -

II. Public POCs for CVE-2026-55728

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-55728

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-55728 (1)

Same Patch Batch · Loytec · 2026-07-24 · 9 CVEs total

CVE-2026-12503 9.2 CRITICAL Loytec LINX firmware: Improper Link Resolution in /usr/bin/larm_starter
CVE-2026-12496 8.7 HIGH Loytec LINX firmware: Unauthenticated stored XSS in OPC XML-DA server
CVE-2026-55730 8.7 HIGH Loytec LWEB802: Reflected Cross-Site Scripting in LWEB802
CVE-2026-55732 8.7 HIGH Loytec LINX firmware: Out-of-bounds Read in BACnet packet parsing (bacdt_datetime_to_tod)
CVE-2026-12502 8.4 HIGH Loytec LINX firmware: Improper Privilege Management in /usr/bin/ltsudo
CVE-2026-12504 8.4 HIGH Loytec LINX firmware: Improper Authentication in PAM configuration
CVE-2026-55729 7.7 HIGH Loytec LWEB802: Exposure of Sensitive Information in browser localStorage
CVE-2026-55731 6.6 MEDIUM Loytec LINX firmware: Unchecked input for loop condition in the SNMP agent

IV. Related Vulnerabilities

Same product: LIP-ME20xC
Same vendor: Loytec
Same weakness: CWE-121