CVE-2025-11783

Authenticated code execution via unbounded username copy

Published Dec 2, 2025 · Updated Dec 2, 2025

Stack-based buffer overflow in Circutor SGE-PLC1000 and SGE-PLC50 9.0.2 allows remote authenticated users to execute code. The index.cgi AddEvent() function passes the user parameter from failed or successful login handling to strcpy(), which copies it into a 48-byte event-message buffer without a length check. Adjacent-network access and low privileges are required, and successful memory corruption can execute attacker-controlled code on the device.

CVSS severity8.5
High
EPSS probability0.58%
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 Circutor SGE-PLC1000 and SGE-PLC50 9.0.2 allows remote authenticated users to execute code. The index.cgi AddEvent() function passes the user parameter from failed or successful login handling to strcpy(), which copies it into a 48-byte event-message buffer without a length check. Adjacent-network access and low privileges are required, and successful memory corruption can execute attacker-controlled code on the device.

The record

CVE
CVE-2025-11783
Published
Dec 2, 2025
Updated
Dec 2, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1190
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 2, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.5INCIBECVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:H/SC:H/SI:L/SA:H
8.9IOActiveCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:L/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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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