CVE Tools
Sign in

CVE-2020-26117

Published: Sep 27, 2020Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-295
8.1HIGH
NVD MITRE
EPSS Score
3.1%
Top 13.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-295

Affected Products

ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
Astra Linux Special Edition для «Эльбрус»On-premOS
Operating Systems / linux-distro
tigervnc
oss-project
tigervncOn-prem
Communications
debian
oss-project·GBaka debian gnu/linux
debian linuxOn-premOS
Operating Systems / linux-distro
opensuse
oss-project·DE
leapOn-premOS
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
TigerVNC developers
oss-projectaka tigervnc
TigerVNCOn-prem
Communications
and 2 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2020-26117?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00025.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00024.html
lists.opensuse.org
https://bugzilla.opensuse.org/show_bug.cgi?id=1176733
bugzilla.opensuse.org
and 16 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2020-26117 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows