CVE-2020-10646

Code execution via undersized VPR heap buffer

Published Apr 13, 2020 · Updated Aug 4, 2024

Heap-based buffer overflow in Fuji Electric V-Server Lite before 4.0.9.0 allows remote attackers to execute code via a crafted VPR file. The VPR parser copies user-supplied data into a heap buffer without validating that the allocation is large enough. Exploitation requires the target to open the file or visit a malicious page, and successful exploitation runs code in the current process.

CVSS severity7.8
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Fuji Electric V-Server Lite before 4.0.9.0 allows remote attackers to execute code via a crafted VPR file. The VPR parser copies user-supplied data into a heap buffer without validating that the allocation is large enough. Exploitation requires the target to open the file or visit a malicious page, and successful exploitation runs code in the current process.

The record

CVE
CVE-2020-10646
Published
Apr 13, 2020
Updated
Aug 4, 2024
Vendor
Fuji Electric
Product
V-Server Lite
Classifications
CWE-122, CWE-787, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=Fuji Electric V-Server Lite all versions prior to 4.0.9.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Fuji Electric · V-Server Liteversion=Fuji Electric V-Server Lite all versions prior to 4.0.9.0

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
T1204.002User Execution Malicious File
T1203Exploitation for Client Execution

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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