Is CVE-2022-36436 actively exploited?

No active exploitation of CVE-2022-36436 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-36436 be exploited remotely?

Yes. CVE-2022-36436 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-36436?

CVE-2022-36436 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2022-36436

CWE-287Published: September 14, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

OSU Open Source Lab VNCAuthProxy through 1.1.1 is affected by an vncap/vnc/protocol.py VNCServerAuthenticator authentication-bypass vulnerability that could allow a malicious actor to gain unauthorized access to a VNC session or to disconnect a legitimate user from a VNC session. A remote attacker with network access to the proxy server could leverage this vulnerability to connect to VNC servers protected by the proxy server without providing any authentication credentials. Exploitation of this issue requires that the proxy server is currently accepting connections for the target VNC server.

NVD Source

Risk Analysis

This is an authentication-bypass vulnerability in the OSU Open Source Lab VNCAuthProxy. It allows remote attackers to connect to protected VNC servers without credentials.

No public exploit is known, and it is not in the KEV catalog. It is remotely exploitable with low attack complexity.

Recommended Action

Update the VNCAuthProxy software to a version that includes authentication fixes.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2022-36436 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.