Privilege escalation in Schneider-Electric Modbus Driver Suite
CVE-2020-7523
Improper Privilege Management vulnerability exists in Schneider Electric Modbus Serial Driver (see security notification for versions) which could cause local privilege escalation when the Modbus Serial Driver service is invoked. The driver does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (8.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Schneider-Electric Modbus Driver Suite
- Schneider-Electric Modbus Serial Driver
- Schneider Electric Modbus Serial Driver (64 Bits) Versions Prior To V3.20 Ie 30, (32 V2.20 And Suite V14.15.0.0 — versions Schneider Electric Modbus Serial Driver (64 bits) versions prior to V3.20 IE 30, Schneider Electric Modbus Serial Driver (32 bits) versions prior to V2.20 IE 30, and Schneider Electric Modbus Driver Suite versions prior to V14.15.0.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.se.com/ww/en/download/document/SEVD-2020-224-01/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2020-7523?
- CVE-2020-7523 is a high-severity vulnerability in Schneider-Electric Modbus Driver Suite, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2020-08-31.
- How severe is CVE-2020-7523?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-7523 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.