EUVD-2026-57787
GHSA-26g8-9jvg-gfw6
Severity by source
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/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
Adjacent network vector required; AC:H reflects AT:P prerequisite (Modbus service must be enabled and reachable); PR:N confirmed; availability-only impact with no confidentiality or integrity effect.
Primary rating from Vendor (001d69cf-3fc9-4203-93fb-9865b54e05b2).
CVSS VectorVendor: 001d69cf-3fc9-4203-93fb-9865b54e05b2
Lifecycle Timeline
1DescriptionCVE.org
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.
AnalysisAI
Heap-based buffer overflow in the modbusgwd daemon on Teltonika Networks RUTOS devices allows unauthenticated attackers with adjacent network access to the Modbus TCP service to crash the gateway process, causing a denial of service. The flaw originates in modbusgwd's failure to properly validate incoming Modbus TCP request data before writing to heap-allocated memory, triggering memory corruption on receipt of a malformed frame. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must be positioned on the same network segment as the affected RUTOS device - adjacent network access (AV:A) is required, meaning direct internet exploitation is not possible without first pivoting to the local network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Overall risk is moderate and tightly scoped to OT network environments. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Consult the Teltonika Networks Security Centre advisory at https://www.teltonika-networks.com/support/security-centre?report=CVE-2026-18368 for vendor-issued firmware patches; a specific patched firmware version is not confirmed in the available data, so monitoring that advisory and applying updates promptly is the primary remediation step. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
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