CVE-2026-120241Public exploitNetwork attack vector

Management-plane crash via oversized multipart boundary

Published Nov 1, 2026 · Updated Nov 1, 2026

Buffer overflow in Ruijie Networks RG-ES208GC ESW_1.0(1)B1P48 allows remote attackers to crash management via httpupg.cgi. Across the affected RG-ES models, the firmware-upgrade handler copies an oversized multipart Content-Type boundary into a fixed-size buffer before authentication. A complete upload body triggers management-plane failure for approximately 8–15 seconds until watchdog recovery; repeated requests sustain denial of service without credentials.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Ruijie Networks RG-ES208GC ESW_1.0(1)B1P48 allows remote attackers to crash management via httpupg.cgi. Across the affected RG-ES models, the firmware-upgrade handler copies an oversized multipart Content-Type boundary into a fixed-size buffer before authentication. A complete upload body triggers management-plane failure for approximately 8–15 seconds until watchdog recovery; repeated requests sustain denial of service without credentials.

The record

CVE
CVE-2026-120241
Published
Nov 1, 2026
Updated
Nov 1, 2026
Vendor
Ruijie Networks
Product
RG-ES210GS-P
Classifications
CWE-120, CWE-119, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Nov 1, 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=ESW_1.0(1)B1P48

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ruijie Networks · RG-ES210GS-Pversion=ESW_1.0(1)B1P48
Ruijie Networks · RG-ES205GCversion=ESW_1.0(1)B1P48
Ruijie Networks · RG-ES208GCversion=ESW_1.0(1)B1P48
Ruijie Networks · RG-ES206GC-Pversion=ESW_1.0(1)B1P48
Ruijie Networks · RG-ES210GC-LPversion=ESW_1.0(1)B1P48

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499Endpoint Denial of Service

Public exploit references

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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