CVE-2026-80146

Description

Lantronix SLC8000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a stack-based buffer overflow vulnerability that allows authenticated attackers to potentially execute arbitrary code by exploiting an undocumented mfc eeprom read command that copies unbounded user input into a bounded stack buffer before passing it to a system() call. Attackers can authenticate as any user to the terminal or CLI interface and supply an oversized input to trigger the overflow, potentially achieving complete loss of confidentiality, integrity, and availability on the affected device and impacting downstream serial-attached devices.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: CRITICAL
CVSS score: 9.4 / 10
CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Effective score: 9.4 / 10 CRITICAL source: CNA overview
CWE(s): CWE-121
Reserved: 2026-08-25
Published: 2026-09-22 15:19 UTC
Last updated: 2026-09-22 15:19 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/80xxx/CVE-2026-80146.json
Linked Threat: CVE-2026-80146 — Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom read

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-22 16:18:00 UTC
NVD last modified: 2026-09-22 20:25:55 UTC
NVD CVSS v3.1: 9.9 / 10 CRITICAL source: disclosure@vulncheck.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Exploitability subscore: 3.1 / 10
Impact subscore: 6.0 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-84511
Assigner: VulnCheck
Published: Sep 22, 2026, 3:19:38 PM
Updated: Sep 22, 2026, 3:19:38 PM
EUVD base score (CVSS 4.0): 9.4 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EUVD-reported EPSS: 0.0000
Vendors: Lantronix
Products: SLCx-03 (*)

SLC8000 (0 <9.7.0.2)

SLB882 (*)

SLCx-02 (*)

EMG8500 (0 <9.7.0.1)

EMG7500 (0 <9.7.0.1)
Aliases: GHSA-88xg-5qpc-c627

ENISA description: Lantronix SLC8000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a stack-based buffer overflow vulnerability that allows authenticated attackers to potentially execute arbitrary code by exploiting an undocumented mfc eeprom read command that copies unbounded user input into a bounded stack buffer before passing it to a system() call. Attackers can authenticate as any user to the terminal or CLI interface and supply an oversized input to trigger the overflow, potentially achieving complete loss of confidentiality, integrity, and availability on the affected device and impacting downstream serial-attached devices.

EUVD references (5)

Affected products (6)

Vendor	Product	Versions	Platforms
LANTRONIX	SLC8000	`0` (affected)	—
LANTRONIX	EMG8500	`0` (affected)	—
LANTRONIX	EMG7500	`0` (affected)	—
LANTRONIX	SLB882	`*` (affected)	—
LANTRONIX	SLCx-03	`*` (affected)	—
LANTRONIX	SLCx-02	`*` (affected)	—

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

Researcher Disclosure technical-description
SLC8000 Firmware patch
EMG8500 Firmware patch
EMG7500 Firmware patch
https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-stack-based-buffer-overflow-via-mfc-eeprom-read third-party-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://revrb.net/2026/09/21/revrb-lantern.html disclosure@vulncheck.com
https://ts.lantronix.com/ftp/emg/EMG_7500/9.7.0.1R2/ disclosure@vulncheck.com
https://ts.lantronix.com/ftp/emg/EMG_8500/9.7.0.1R2/ disclosure@vulncheck.com
https://ts.lantronix.com/ftp/slc8000/9.7.0.2R1/ disclosure@vulncheck.com
https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-stack-based-buffer-overflow-via-mfc-eeprom-read disclosure@vulncheck.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2026-80146 · LANTRONIX · CVSS 9.9 · CVE Brief Analyst Report

web:cvebrief.com

Remediation Immediate Action: Update firmware for SLC8000 to version 9.7.0.2 and EMG8500/EMG7500 to version 9.7.0.1 immediately. For end-of-support devices like the SLCx-02 and SLCx-03 series, decommission the hardware as no patches are forthcoming.

2026-09-23 15:15 UTC
Chrome fixes sixth zero-day vulnerability this year - HackMag

web:hackmag.com

Google developers have released an update for the Chrome browser that fixes 12 vulnerabilities, including an actively exploited zero-day flaw in the V8 engine ( CVE - 2026 -85046). The bug allows attackers to achieve arbitrary code execution through a specially crafted HTML page. The vulnerability has a CVSS score of 8.8 and is a type confusion flaw. The issue affects V8, the JavaScript and ...

2026-09-23 15:15 UTC
Chrome Zero-Day CVE-2026-85046: Google Patches Actively Exploited V8 ...

web:netguide.io

An exploit is already circulating Google confirms that an exploit for CVE - 2026 -85046 exists in the wild. The company withheld further details about the attacks to give users and dependent projects time to apply the patch . The vulnerability was reported on August 4, 2026 , by security researcher Salvatore Gulizia (aka Serotav), who received a $1,000 bug bounty. The fix is included in the Stable ...

2026-09-23 15:15 UTC
CVE-2026-85046: Chrome V8 Type Confusion Actively Exploited — Detection ...

web:securityarsenal.com

Google patched CVE - 2026 -85046, an actively exploited V8 type confusion flaw in Chrome. Update to 152..7977.82 immediately — detection and remediation guidance inside.

2026-09-23 15:15 UTC
CVE-2026-85046: Chrome V8 Zero-Day Exploited - socprime.com

web:socprime.com

Users of these products should install vendor updates containing the corresponding Chromium security fix as soon as those releases become available. Because exploitation was already underway before public disclosure, CVE - 2026 -85046 mitigation should include both rapid patching and retrospective investigation of suspicious browser activity on ...

2026-09-23 15:15 UTC
Chrome Zero-Day CVE-2026-85046: KEV Deadline Sept 18

web:tech-insider.org

Google patched actively exploited Chrome zero-day CVE - 2026 -85046 on Sept 4, 2026 . CISA set a Sept 18 federal deadline. Here is what to know.

2026-09-23 15:15 UTC
CVE-2026-85046 Explained: Inside Chrome's V8 Zero-Day | The CyberSec Guru

web:thecybersecguru.com

CVE - 2026 -85046 is a V8 type confusion zero-day already exploited in Chrome. Here's how the read/write primitive works, and how to patch immediately

2026-09-23 15:15 UTC
Google Chrome Zero-day CVE-2026-85046 - Qualys ThreatPROTECT

web:threatprotect.qualys.com

Google Chrome zero-day vulnerability CVE - 2026 -85046 is being exploited in the wild. CISA also added the vulnerability to its KEV.

2026-09-23 15:15 UTC
Google Patches 6th Chrome Zero-Day of 2026 - SecurityWeek

web:www.securityweek.com

Google on Thursday rolled out fresh Chrome 152 security updates that resolve 12 vulnerabilities, including an exploited zero-day. Tracked as CVE - 2026 -85046, the high-severity bug is described as a type confusion issue in Chrome's V8 JavaScript and WebAssembly engine. It was reported by Salvatore Gulizia, who received a $1,000 bug bounty reward. "Google is aware that an exploit for CVE-2026 ...

2026-09-23 15:15 UTC
CVE-2026-85046 | Google Chromium V8 Vulnerability | UpGuard

web:www.upguard.com

CVE - 2026 -85046 is a high-severity (8.8) type confusion vulnerability in Google Chrome's V8 engine being actively exploited for remote code execution.

2026-09-23 15:15 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-80146.json.

{
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        {
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          "product": "SLC8000",
          "vendor": "LANTRONIX",
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            {
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              "status": "affected",
              "version": "0",
              "versionType": "custom"
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          ]
        },
        {
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        },
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        },
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
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            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
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      "providerMetadata": {
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        },
        {
          "name": "SLC8000 Firmware",
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          ],
          "url": "https://ts.lantronix.com/ftp/slc8000/9.7.0.2R1/"
        },
        {
          "name": "EMG8500 Firmware",
          "tags": [
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          ],
          "url": "https://ts.lantronix.com/ftp/emg/EMG_8500/9.7.0.1R2/"
        },
        {
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        },
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        }
      ],
      "source": {
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    "datePublished": "2026-09-22T15:19:38.818Z",
    "dateReserved": "2026-08-25T20:43:54.261Z",
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}