CVE-2026-120241

Description

A vulnerability was identified in Ruijie RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP and RG-ES210GS-P ESW_1.0(1)B1P48. Impacted is an unknown function of the file httpupg.cgi of the component Local Firmware Upgrade Interface. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

Overview

State: PUBLISHED
Assigner (CNA): VulDB
CVSS severity: HIGH
CVSS score: 8.7 / 10
CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
Effective score: 8.7 / 10 HIGH source: CNA overview
CWE(s): CWE-120, CWE-119
Reserved: 2026-10-31
Published: 2026-11-01 18:45 UTC
Last updated: 2026-11-01 18:45 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/120xxx/CVE-2026-120241.json
Linked Threat: CVE-2026-120241 — Ruijie RG-ES205GC Local Firmware Upgrade httpupg.cgi buffer overflow

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: 2026-11-01 19:16:59 UTC
NVD last modified: 2026-11-01 19:16:59 UTC
NVD CVSS v3.1: 7.5 / 10 HIGH source: cna@vuldb.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 3.6 / 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-2026-114883
Assigner: VulDB
Published: Nov 1, 2026, 6:45:15 PM
Updated: Nov 1, 2026, 6:45:15 PM
EUVD base score (CVSS 4.0): 8.7 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
EUVD-reported EPSS: 0.0000
Vendors: Ruijie
Products: RG-ES210GS-P (ESW_1.0(1)B1P48)

RG-ES208GC (ESW_1.0(1)B1P48)

RG-ES210GC-LP (ESW_1.0(1)B1P48)

RG-ES206GC-P (ESW_1.0(1)B1P48)

RG-ES205GC (ESW_1.0(1)B1P48)
Aliases: GHSA-6j24-g64r-jw54

ENISA description: A vulnerability was identified in Ruijie RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP and RG-ES210GS-P ESW_1.0(1)B1P48. Impacted is an unknown function of the file httpupg.cgi of the component Local Firmware Upgrade Interface. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

EUVD references (5)

Affected products (5)

Vendor	Product	Versions	Platforms
Ruijie	RG-ES205GC	`ESW_1.0(1)B1P48` (affected)	—
Ruijie	RG-ES206GC-P	`ESW_1.0(1)B1P48` (affected)	—
Ruijie	RG-ES208GC	`ESW_1.0(1)B1P48` (affected)	—
Ruijie	RG-ES210GC-LP	`ESW_1.0(1)B1P48` (affected)	—
Ruijie	RG-ES210GS-P	`ESW_1.0(1)B1P48` (affected)	—

Vendor references (5)

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

VDB-429600 | Ruijie RG-ES205GC Local Firmware Upgrade httpupg.cgi buffer overflow vdb-entry
VDB-429600 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-required
CVE-2026-120241 | CVE Analysis and Report third-party-advisory
Submit #1016041 | Ruijie Networks Co., Ltd. RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP, RG-ES210GS-P (sharing the same ESW firmware; NIS2100 series may also be aff ESW_1.0(1)B1P48, Release(12211919) Buffer Overflow third-party-advisory
https://github.com/byseeker/Ruijie-RG-ES-Series-Switches_PreAuth_Boundary_Overflow_DoS exploit

MITRE references (5) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://github.com/byseeker/Ruijie-RG-ES-Series-Switches_PreAuth_Boundary_Overflow_DoS exploit
CVE-2026-120241 | CVE Analysis and Report third-party-advisory
Submit #1016041 | Ruijie Networks Co., Ltd. RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP, RG-ES210GS-P (sharing the same ESW firmware; NIS2100 series may also be aff ESW_1.0(1)B1P48, Release(12211919) Buffer Overflow third-party-advisory
VDB-429600 | Ruijie RG-ES205GC Local Firmware Upgrade httpupg.cgi buffer overflow vdb-entry
VDB-429600 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required

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://github.com/byseeker/Ruijie-RG-ES-Series-Switches_PreAuth_Boundary_Overflow_DoS cna@vuldb.com
https://vuldb.com/cve/CVE-2026-120241 cna@vuldb.com
https://vuldb.com/submit/1016041 cna@vuldb.com
https://vuldb.com/vuln/429600 cna@vuldb.com
https://vuldb.com/vuln/429600/cti cna@vuldb.com

Remediations (10)

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

CVE Database Search & Remediation Guidance

web:cvedatabase.com

Search and analyze CVE vulnerabilities with instant access to CVSS scores, affected products, and remediation guidance.

2026-11-02 11:32 UTC
CVE Vulnerabilities 2026: Critical Flaws & Fixes Hub

web:cyberupdates365.com

Track critical CVE vulnerabilities 2026 with verified enterprise patch guides. Fix zero-days across VMware, WordPress, Windows, and cloud infrastructure.

2026-11-02 11:32 UTC
What Is CVE Remediation in 2026? - aikido.dev

web:www.aikido.dev

None of these is a clean fix , which is why the decision on how to remediate depends on knowing what package versions are running in production and why. This post will cover how AI has accelerated CVE detection and discovery, the upgrade trap, what CVE remediation actually involves in 2026 , and how to solve the CVE remediation problem.

2026-11-02 11:32 UTC
Known Exploited Vulnerabilities Catalog - CISA

web:www.cisa.gov

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild. Organizations should use the KEV catalog as an input to their vulnerability management prioritization framework. Learn more about ...

2026-11-02 11:32 UTC
CVE: Common Vulnerabilities and Exposures

web:www.cve.org

At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

2026-11-02 11:32 UTC
National Vulnerability Database | NIST

web:www.nist.gov

NIST maintains the National Vulnerability Database (NVD), a repository of information on software and hardware flaws that can compromise computer security. This is a key piece of the nation's cybersecurity infrastructure.

2026-11-02 11:32 UTC
The 8 Best Automated Vulnerability Remediation Tools in 2026

web:www.openhands.dev

Compare 8 automated vulnerability remediation tools for 2026 on fixes, prioritization, integrations, and deployment control.

2026-11-02 11:32 UTC
Critical Patch Updates, Critical Security Patch Updates ... - Oracle

web:www.oracle.com

Critical Security Patch Updates Critical Security Patch Updates provide security patches for supported Oracle on-premises products. A Critical Security Patch Update provides targeted, high-priority security fixes in a smaller, more focused format, making them easier to apply with minimal disruption.

2026-11-02 11:32 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-11-02 11:32 UTC
The CVE Database: Curated Vulnerability Intelligence by Wiz | Wiz

web:www.wiz.io

Wiz's CVE Database curates CVE data to create easy-to-navigate profiles that cover the entire vulnerability timeline, exploit scenarios, and mitigation steps.

2026-11-02 11:32 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-120241.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:ruijie:rg-es205gc:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Local Firmware Upgrade Interface"
          ],
          "product": "RG-ES205GC",
          "vendor": "Ruijie",
          "versions": [
            {
              "status": "affected",
              "version": "ESW_1.0(1)B1P48"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:ruijie:rg-es206gc-p:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Local Firmware Upgrade Interface"
          ],
          "product": "RG-ES206GC-P",
          "vendor": "Ruijie",
          "versions": [
            {
              "status": "affected",
              "version": "ESW_1.0(1)B1P48"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:ruijie:rg-es208gc:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Local Firmware Upgrade Interface"
          ],
          "product": "RG-ES208GC",
          "vendor": "Ruijie",
          "versions": [
            {
              "status": "affected",
              "version": "ESW_1.0(1)B1P48"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:ruijie:rg-es210gc-lp:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Local Firmware Upgrade Interface"
          ],
          "product": "RG-ES210GC-LP",
          "vendor": "Ruijie",
          "versions": [
            {
              "status": "affected",
              "version": "ESW_1.0(1)B1P48"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:ruijie:rg-es210gs-p:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Local Firmware Upgrade Interface"
          ],
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          "versions": [
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            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "seeker (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was identified in Ruijie RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP and RG-ES210GS-P ESW_1.0(1)B1P48. Impacted is an unknown function of the file httpupg.cgi of the component Local Firmware Upgrade Interface. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R",
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        {
          "cvssV2_0": {
            "baseScore": 7.8,
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C/E:POC/RL:ND/RC:UR",
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          }
        }
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      "problemTypes": [
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          "descriptions": [
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            }
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        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
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      "providerMetadata": {
        "dateUpdated": "2026-11-01T18:45:15.676Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-429600 | Ruijie RG-ES205GC Local Firmware Upgrade httpupg.cgi buffer overflow",
          "tags": [
            "vdb-entry"
          ],
          "url": "https://vuldb.com/vuln/429600"
        },
        {
          "name": "VDB-429600 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/429600/cti"
        },
        {
          "name": "CVE-2026-120241 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-120241"
        },
        {
          "name": "Submit #1016041 | Ruijie Networks Co., Ltd. RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP, RG-ES210GS-P (sharing the same ESW firmware; NIS2100 series may also be aff ESW_1.0(1)B1P48, Release(12211919) Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/1016041"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/byseeker/Ruijie-RG-ES-Series-Switches_PreAuth_Boundary_Overflow_DoS"
        }
      ],
      "timeline": [
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          "lang": "en",
          "time": "2026-10-31T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-10-31T01:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-10-31T21:25:53.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Ruijie RG-ES205GC Local Firmware Upgrade httpupg.cgi buffer overflow",
      "x_generator": [
        "VulDB PVTS v202611"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-120241",
    "datePublished": "2026-11-01T18:45:15.676Z",
    "dateReserved": "2026-10-31T20:20:44.175Z",
    "dateUpdated": "2026-11-01T18:45:15.676Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}