What’s Vulnerable › Vulnerabilities

CVE-2020-6994

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-04-03 · updated 2026-06-17
• Weakness: CWE-12

Description

A buffer overflow vulnerability was found in some devices of Hirschmann Automation and Control HiOS and HiSecOS. The vulnerability is due to improper parsing of URL arguments. An attacker could exploit this vulnerability by specially crafting HTTP requests to overflow an internal buffer. The following devices using HiOS Version 07.0.02 and lower are affected: RSP, RSPE, RSPS, RSPL, MSP, EES, EES, EESX, GRS, OS, RED. The following devices using HiSecOS Version 03.2.00 and lower are affected: EAGLE20/30.

Affected products

• Belden Hirschmann HiOS: through 07.0.02
• Belden Hirschmann Hisecos: through 03.2.00

References

• https://www.us-cert.gov/ics/advisories/icsa-20-091-01
• https://www.us-cert.gov/ics/advisories/icsa-20-091-01

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