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6.8

IDS NC854/NC856 modules let logged-in users read any file

CVE-2015-3939 · published 11 years ago
Summary

The NC854 and NC856 modules used in IDS RTU 850C devices have a weakness that allows someone with a valid login to the device's internal web page to open and read files they should not see, such as files that store Telnet passwords. This could expose confidential credentials and other sensitive data. Apply the vendor's security update, limit who can log in, and consider isolating these devices from the broader network.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
ids nc854 All versions
cpe:2.3:a:ids:nc854:-:*:*:*:*:*:*:*
ids nc856 All versions
cpe:2.3:a:ids:nc856:-:*:*:*:*:*:*:*
Original advisory text
Directory traversal vulnerability in the NC854 and NC856 modules for IDS RTU 850C devices allows remote authenticated users to read arbitrary files via unspecified vectors involving an internal web...
Directory traversal vulnerability in the NC854 and NC856 modules for IDS RTU 850C devices allows remote authenticated users to read arbitrary files via unspecified vectors involving an internal web server, as demonstrated by reading a TELNET credentials file.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
6.8 Medium
Exploitation
3% chance of attack within 30 days
Type
CWE-22Path Traversal
Timeline
Published31 May 2015
Updated30 Oct 2026
First seen29 Sep 2026
Sources
CVE-2015-3939 · NVD
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