Which versions of Tomato are affected by CVE-2026-16095?

Shibby Tomato 1.28 router firmware contains a high-severity memory corruption vulnerability (CVSS 8.7) affecting RT-N5x devices that requires authentication to exploit but lacks vendor remediation…

How to fix or mitigate CVE-2026-16095?

Within 24 hours: identify all RT-N5x routers running Tomato 1.28 in production, disable remote web administration access, and restrict router admin access to internal trusted networks only. Within 7 days: evaluate firmware migration to FreshTomato as the supported successor or plan hardware replacement with vendor-supported alternatives, and implement network segmentation to isolate router management interfaces. Within 30 days: complete migration to FreshTomato or deploy replacement routers, document decommissioning of any retained Tomato 1.28 instances, and obtain formal risk acceptance from business ownership.

Tomato CVE-2026-16095

Q: What is the CVSS score of CVE-2026-16095?

CVE-2026-16095 has a CVSS 4.0 base score of 8.7 (High). CVSS vector: 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/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. EPSS exploitation probability: 0.4%.

EUVD-2026-45370 HIGH

Out-of-bounds Write (CWE-787)

2026-07-18 VulDB

GHSA-6jfj-qh5w-m9vr

Buffer Overflow Memory Corruption Tomato Shibby

8.7

CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY

8.7 HIGH

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/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

Primary rating from Vendor (VulDB) · only source for this CVE.

CVSS VectorVendor: VulDB

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Jul 18, 2026 - 11:16 vuln.today

CVE Published

Jul 18, 2026 - 10:15 cve.org

HIGH 8.7

DescriptionCVE.org

A flaw has been found in Shibby Tomato 1.28 RT-N5x MIPSR2 Build 124. Affected by this issue is the function setup_conntrack of the file /sbin/rc. Executing a manipulation of the argument ct_tcp_timeout can lead to out-of-bounds write. The attack may be performed from remote. This project is superseded by FreshTomato.

AnalysisAI

Out-of-bounds write in Shibby Tomato 1.28 (RT-N5x MIPSR2 Build 124) router firmware lets an authenticated attacker corrupt memory in the setup_conntrack routine of /sbin/rc by manipulating the ct_tcp_timeout argument. The flaw (CWE-787) is reachable over the network and carries a CVSS 4.0 base of 8.7, but no public exploit is identified at time of analysis and it is not on CISA KEV. The affected project is end-of-life and superseded by FreshTomato, so no upstream fix is expected.