What’s Vulnerable › Vulnerabilities

CVE-2020-3931: GeoVision Door Access Control Device - Buffer overflow vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-08 · updated 2026-06-17
• Weakness: CWE-120

Description

Buffer overflow exists in Geovision Door Access Control device family, an unauthenticated remote attacker can execute arbitrary command.

Affected products

• GeoVision Gv-As1010 Firmware: before 1.32 — fixed in 1.32
• GeoVision Gv-As210 Firmware: before 2.21 — fixed in 2.21
• GeoVision Gv-As410 Firmware: before 2.21 — fixed in 2.21
• GeoVision Gv-As810 Firmware: before 2.21 — fixed in 2.21
• GeoVision Gv-Gf1921 Firmware: before 1.10 — fixed in 1.10
• GeoVision Gv-Gf1922 Firmware: before 1.10 — fixed in 1.10

How to fix

Upgrade to a fixed version: GeoVision Gv-As1010 Firmware 1.32; GeoVision Gv-As210 Firmware 2.21; GeoVision Gv-As410 Firmware 2.21; GeoVision Gv-As810 Firmware 2.21; GeoVision Gv-Gf1921 Firmware 1.10; GeoVision Gv-Gf1922 Firmware 1.10. Check the vendor advisory for mitigations.

References

• https://www.acronis.com/en-us/blog/posts/backdoor-wide-open-critical-vulnerabilities-uncovered-geovision
• https://www.twcert.org.tw/tw/cp-132-3754-b77d0-1.html
• https://www.acronis.com/en-us/blog/posts/backdoor-wide-open-critical-vulnerabilities-uncovered-geovision
• https://www.twcert.org.tw/tw/cp-132-3754-b77d0-1.html

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