What’s Vulnerable › Vulnerabilities

CVE-2020-35766

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-28 · updated 2026-06-17
• Weakness: CWE-59

Description

The test suite in libopendkim in OpenDKIM through 2.10.3 allows local users to gain privileges via a symlink attack against the /tmp/testkeys file (related to t-testdata.h, t-setup.c, and t-cleanup.c). NOTE: this is applicable to persons who choose to engage in the "A number of self-test programs are included here for unit-testing the library" situation.

Affected products

• Opendkim: through 2.10.3

References

• https://github.com/trusteddomainproject/OpenDKIM/issues/113
• https://github.com/trusteddomainproject/OpenDKIM/issues/113

Get alerted when CVE-2020-35766 or the next vulnerability affects your stack