cve.bz

CVE-2020-26117

8.1 highEPSS 3.1%

High (8.1). EPSS 3.1% chance of exploitation in the next 30 days.

In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.

Severity

CVSS 3.1

8.1 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS
3.1% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-11-01)
CWE
CWE-295
Published
Modified
Record from
the NVD, synced

Affected

References

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