CVE-2025-70956Network attack vector

Denial of service via non-atomic RUNVM transfer

Published Feb 13, 2026 · Updated Feb 13, 2026

State corruption in TON Virtual Machine before 2025.04 allows remote attackers to interrupt smart-contract execution through RUNVM. VmState::run_child_vm moves the parent libraries and log into a child non-atomically, so an out-of-gas exception can leave those parent resources empty or invalid. Gas isolation lets the parent resume in the corrupted state, causing unexpected behavior or denial of service within the affected contract context.

CVSS severity7.5
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

State corruption in TON Virtual Machine before 2025.04 allows remote attackers to interrupt smart-contract execution through RUNVM. VmState::run_child_vm moves the parent libraries and log into a child non-atomically, so an out-of-gas exception can leave those parent resources empty or invalid. Gas isolation lets the parent resume in the corrupted state, causing unexpected behavior or denial of service within the affected contract context.

The record

CVE
CVE-2025-70956
Published
Feb 13, 2026
Updated
Feb 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1321, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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