PT-2025-27787 · Vnc · Vnc

Published 2025-07-03 · Updated 2025-07-03 · CVE-2025-27458

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:C/I:N/A:N

Name of the Vulnerable Software and Affected Versions: VNC (affected versions not specified)

Description: The issue concerns the VNC authentication mechanism, which uses a challenge-response system. This system relies on both the server and client using the same password for encryption. An attacker can exploit this by obtaining the challenge and response, as all VNC communication is unencrypted, and then attempt to derive the password from this information.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use of a Broken Cryptographic Algorithm

Weakness Enumeration

CWE-327

Related Identifiers

BDU:2025-11699

CVE-2025-27458

Affected Products

Vnc

References · 10

• https://sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf · Vendor Advisory
• https://sick.com/.well-known/csaf/white/2025/sca-2025-0008.json · Vendor Advisory
• https://sick.com/psirt · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-11699 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-27458 · Security Note
• https://first.org/cvss/calculator/3.1 · Note
• https://twitter.com/VulmonFeeds/status/1940862800705868070 · Twitter Post
• https://twitter.com/CVEnew/status/1940738062763601933 · Twitter Post
• https://endress.com · Note
• https://cisa.gov/resources-tools/resources/ics-recommended-practices · Note