Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2022-36436

32
FAUCET Score

CVE-2022-36436 is a critical authentication bypass vulnerability affecting OSU Open Source Lab VNCAuthProxy versions through 1.1.1. A remote, unauthenticated attacker can exploit this flaw to gain unauthorized access to VNC sessions or disconnect legitimate users, provided the proxy is accepting connections for the target VNC server. With a CVSS score of 9.8, this vulnerability poses a severe risk of complete compromise (confidentiality, integrity, and availability). While there are no known public exploits or active exploitation, the vulnerability has garnered significant community discussion, indicating awareness and potential future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.0CPE matchmatch criteria
cpe:2.3:a:osuosl:twisted_vnc_authentication_proxy:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.71%
Probability of exploitation in next 30 days
EPSS Percentile
75.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0171 is in the 63rd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: vncauthproxyFixed in: 1.2.0

Vendor Advisories (1)

pipGHSA-237r-mx84-7x8ccritical

VNCAuthProxy authentication bypass vulnerability

Sep 16, 2022

References

cert.grnet.gr / en/blog/cve-2022-36436-twisted-vnc-authentication-proxy-authentication-bypass
ExploitPatch
github.com / osuosl/twisted_vncauthproxy/commit/edc149af29242178091b2d6fcd42c3ef0851644b
Patch
github.com / osuosl/twisted_vncauthproxy/tree/release/1.1.1
Release Notes
pypi.org / project/VNCAuthProxy
Product