CVE-2020-8809

HIGH
8.1
CVSS Score
Published: February 25, 2020 at 06:57 PM UTC
Updated: June 17, 2026 at 03:26 AM UTC
1 product affected across 1 vendorDevice Language Message Specification Director

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Severity
HIGH8.1
Exploit prediction
EPSS 1%

Description

Gurux GXDLMS Director prior to 8.5.1905.1301 downloads updates to add-ins and OBIS code over an unencrypted HTTP connection. A man-in-the-middle attacker can prompt the user to download updates by modifying the contents of gurux.fi/obis/files.xml and gurux.fi/updates/updates.xml. Then, the attacker can modify the contents of downloaded files. In the case of add-ins (if the user is using those), this will lead to code execution. In case of OBIS codes (which the user is always using as they are needed to communicate with the energy meters), this can lead to code execution when combined with CVE-2020-8810.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.5.1905.1301
Affected range stops below 8.5.1905.1301, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCExploitThird Party Advisory
https://github.com/seqred-s-a/gxdlmsdirector-cve
x_refsource_MISCExploitThird Party Advisory
https://seqred.pl/en/cve-gurux-gxdlms-director/

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-494

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