CVE-2025-61856

Arbitrary code execution via crafted-file stack overflow

Published Oct 10, 2025 · Updated Oct 10, 2025

Stack-based buffer overflow in Fuji Electric V-SFT 6.2.7.0 and earlier allows attackers to execute code via a crafted V-SFT file. VS6ComFile!CV7BaseMap::WriteV7DataToRom overflows a stack buffer while processing attacker-controlled file data; public advisories disclose no lower-level copy operation. A user must open the file, after which the application can disclose information, terminate abnormally, or execute arbitrary code.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Fuji Electric V-SFT 6.2.7.0 and earlier allows attackers to execute code via a crafted V-SFT file. VS6ComFile!CV7BaseMap::WriteV7DataToRom overflows a stack buffer while processing attacker-controlled file data; public advisories disclose no lower-level copy operation. A user must open the file, after which the application can disclose information, terminate abnormally, or execute arbitrary code.

The record

CVE
CVE-2025-61856
Published
Oct 10, 2025
Updated
Oct 10, 2025
Vendor
Fuji Electric
Product
V-SFT
Classifications
CWE-121, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=v6.2.7.0 and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Fuji Electric · V-SFTversion=v6.2.7.0 and earlier

Published CVSS scores

8.4JPCERT/CCCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8JPCERT/CCCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution
T1204.002Malicious File

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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