Buffer overflow in Ruijie Rg-Es205gc
CVE-2026-120241
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Ruijie Rg-Es205gc — versions ESW_1.0(1)B1P48
- Ruijie Rg-Es206gc-P — versions ESW_1.0(1)B1P48
- Ruijie Rg-Es208gc — versions ESW_1.0(1)B1P48
- Ruijie Rg-Es210gc-Lp — versions ESW_1.0(1)B1P48
- Ruijie Rg-Es210gs-P — versions ESW_1.0(1)B1P48
Weakness classification (CWE)
References
- vuldb.com/vuln/429600 (vdb-entry)
- vuldb.com/vuln/429600/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-120241 (third-party-advisory)
- vuldb.com/submit/1016041 (third-party-advisory)
- github.com/byseeker/Ruijie-RG-ES-Series-Switches_PreAuth_Boundary_Overflow_DoS (exploit)
Frequently asked questions
- What is CVE-2026-120241?
- CVE-2026-120241 is a high-severity vulnerability in Ruijie Rg-Es205gc, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2026-11-01.
- How severe is CVE-2026-120241?
- High severity. CVSS v3 base score is 7.5 out of 10.