CVE-2026-81944Network attack vector

Authenticated code execution via unchecked stack copy

Published Sep 18, 2026 · Updated Sep 18, 2026

Stack-based buffer overflow in PLANET IGS-5225-8P2T4S firmware allows remote authenticated users to crash the switch or execute code. The web server copies attacker-controlled data into a stack buffer without sufficient bounds checking, overwriting adjacent stack memory. The flaw affects V1 firmware before 1.2412b260707 and V2 firmware before 2.2412b260519; exploitation requires web access credentials.

CVSS severity7.7
High
EPSS probability0.71%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in PLANET IGS-5225-8P2T4S firmware allows remote authenticated users to crash the switch or execute code. The web server copies attacker-controlled data into a stack buffer without sufficient bounds checking, overwriting adjacent stack memory. The flaw affects V1 firmware before 1.2412b260707 and V2 firmware before 2.2412b260519; exploitation requires web access credentials.

The record

CVE
CVE-2026-81944
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
PLANET Technology Corp.
Product
IGS-5225-8P2T4S
Classifications
CWE-121, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=0 <1.2412b260707
  2. Affected versionversion=0 <2.2412b260519

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PLANET Technology Corp. · IGS-5225-8P2T4Sversion=0 <1.2412b260707; version=0 <2.2412b260519

Published CVSS scores

7.7PLANET Technology Corp.CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.5PLANET Technology Corp.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1210Exploitation of Remote Services

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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