RTDE Interface allows unauthenticated reading of robot data and unauthenticated writing of registers and outputs

published 2020-04-06 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-2719

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits: 0; none known

CB3 SW Version 3.3 and upwards, e-series SW Version 5.0 and upwards allow authenticated access to the RTDE (Real-Time Data Exchange) interface on port 30004 which allows setting registers, the speed slider fraction as well as digital and analog Outputs. Additionally unautheticated reading of robot data is also possible

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	5.8	AV:A/AC:L/Au:N/C:P/I:P/A:P

Affected products

Universal Robots A/S Universal Robots Robot Controllers CB 3.1
Universal Robots A/S Universal Robots Robot Controllers e-Series

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-306 Missing Authentication for Critical Functionality

References

universal-robots.com /how-tos-and-faqs/how-to/ur-how-tos/real-time-data-exchange-rtde-guide/
vendor-advisory

Sources

CVE List CVE-2020-10264
NVD CVE-2020-10264

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary