PatchTheCVECVE-2020-8809: Gurux GXDLMS Director prior to 8.5.1905.1301 downloads updates to add-ins and OBIS code over an unencrypted HT
CVE-2020-8809 is a high-severity flaw (CVSS 8.1) affecting device language message specification director. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 co
Why this priority
- High severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.1 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.2% (top 32%) |
| CISA exploited list | No |
| Weakness | CWE-494 |
| Published | 2020-02-25 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-8809?
device language message specification director: upgrade to 8.5.1905.1301. Exact commands for each OS are on this page.
Is CVE-2020-8809 being exploited?
CVE-2020-8809 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-8809 affect?
CVE-2020-8809 affects device language message specification director. Severity is high (CVSS 8.1). 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/fil
How urgent is CVE-2020-8809?
Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2020-8810 HIGH 8.1 UPGRADE An issue was discovered in Gurux GXDLMS Director through 8.5.1905.1301