AUGUST 4, 2026
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Case File

CVE-2020-9307

MEDIUM · CVSS 6.5 EPSS 0.57%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-11 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.5. It may lead to a denial-of-service condition.

CVE
CVE-2020-9307
Severity
MEDIUM
CVSS
6.5
EPSS
0.57%

Original NVD Description

Hirschmann OS2, RSP, and RSPE devices before HiOS 08.3.00 allow a denial of service. An unauthenticated, adjacent attacker can cause an infinite loop on one of the HSR ring ports of the device. This effectively breaks the redundancy of the HSR ring. If the attacker can perform the same attack on a second device, the ring is broken into two parts (thus disrupting communication between devices in the different parts).

Related CVEs

Other vulnerabilities affecting the same vendor(s)