What’s Vulnerable › Vulnerabilities

CVE-2021-36809

• Severity: medium (CVSS 6.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-08 · updated 2026-06-17

Description

A local attacker can overwrite arbitrary files on the system with VPN client logs using administrator privileges, potentially resulting in a denial of service and data loss, in all versions of Sophos SSL VPN client.

Affected products

• Sophos SSL VPN client: all versions

References

• https://www.sophos.com/en-us/security-advisories/sophos-sa-20220303-sslvpn-local-dos
• https://www.sophos.com/en-us/security-advisories/sophos-sa-20220303-sslvpn-local-dos

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