CVE-2026-18368 PUBLISHED

Heap buffer overflow in Modbusgwd

Assigner: tlt_net
Reserved: 30.07.2026 Published: 13.08.2026 Updated: 13.08.2026

In Teltonika Networks RUTOS devices, a vulnerability exists in modbusgwd due to improper handling of Modbus TCP request data. A remote, unauthenticated attacker with access to the affected service could trigger a heap-based buffer overflow, resulting in a denial of service.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Teltonika Networks
Product	RUTOS
Versions	Default: unaffected affected from 7.12.0 to 7.24.1 (incl.)

Solutions

Update to RUTOS 7.24.2 or later

References

https://www.teltonika-networks.com/support/security-centre?report=CVE-2026-18368

Problem Types

CWE-122: Heap-based Buffer Overflow CWE

Impacts

CAPEC-100: Overflow Buffers