CVE-2026-120241 Ruijie RG-ES Series - Buffer Overflow

Ruijie RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP, and RG-ES210GS-P ESW_1.0(1)B1P48 contain a buffer overflow caused by manipulation of an unknown function in httpupg.cgi Local Firmware Upgrade Interface, letting remote attackers execute arbitrary code, exploit requires remote access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.62% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
1 November 2026
Updated
3 November 2026
Weakness
CWE-119

Vendor fix

Update to the latest available version or patch from the vendor.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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