CVE-2026-112351

High

Description

Sunhillo SureLine before 9.1.5 contains an OS command injection vulnerability in the networkDiag.cgi endpoint that allows an authenticated remote attacker with any web account to execute arbitrary commands as root by injecting shell metacharacters into the ipAddr or dnsAddr parameters. Attackers can bypass the incomplete character denylist from the prior CVE-2021-36380 fix using URL-encoded newline (%0a) or ampersand (%26) sequences that act as command separators after decoding in the ping, nslookup, or traceroute diagnostic modes, leading to full system compromise.

SeverityHigh
CVSS8.8
Exploit probability—
ProductSunhillo Sureline
PublishedOct 27, 2026
First seenOct 27, 2026

How to fix

Update
  • sunhillo sureline9.1.5 or later

Affected products

ProductAffected versionsFixed in
sunhillo sureline8.6.0 ≤ v < 9.1.59.1.5

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