CVE-2026-12847Network attack vector

Unauthenticated code execution via unbounded gateway copy

Published Jun 24, 2026 · Updated Jun 24, 2026

Stack-based buffer overflow in GeoVision GV-I/O Box 4E 2.09 allows remote attackers to execute arbitrary code via UDP port 10001. The default DVRSearch service measures an attacker-controlled gateway string and copies that length into reply_buf at offset 216 without checking the remaining stack-buffer capacity. Any network host can reach the unauthenticated service; corruption can redirect execution or crash the process.

CVSS severity10.0
Critical
EPSS probability0.60%
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 GeoVision GV-I/O Box 4E 2.09 allows remote attackers to execute arbitrary code via UDP port 10001. The default DVRSearch service measures an attacker-controlled gateway string and copies that length into reply_buf at offset 216 without checking the remaining stack-buffer capacity. Any network host can reach the unauthenticated service; corruption can redirect execution or crash the process.

The record

CVE
CVE-2026-12847
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
GeoVision
Product
GV-I/O Box 4E
Classifications
CWE-121, CAPEC-100, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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?

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

  1. Affected versionversion=V2.09

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GeoVision · GV-I/O Box 4Eversion=V2.09

Published CVSS scores

10.0GeoVisionCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CAPEC-100Overflow Buffers
T1210Exploitation of Remote Services

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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