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CVE-2017-20083· NVD / CVE Program· CNA VulDB

JUNG Smart Visu Server SSH Server backdoor

A vulnerability, which was classified as critical, was found in JUNG Smart Visu Server 1.0.804/1.0.830/1.0.832. Affected is an unknown function of the component SSH Server. The manipulation leads to backdoor. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. Upgrading to version 1.0.900 is able to address this issue. It is recommended to upgrade the affected component.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jun 22, 2022
Updated
Jun 16, 2026
EPSS
0.4% · 29th percentile
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Report tools

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Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · VulDB
5.3
2.5 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
jung-groupsmart visu server firmware
jung-groupsmart visu server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • jung-group smart visu server firmware1.0.804
  • jung-group smart visu server firmware1.0.830
  • jung-group smart visu server firmware1.0.832

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulDB). Independent of NVD's CPE analysis and usually ahead of it.

  • JUNG Smart Visu Server

    • 1.0.804, 1.0.830, 1.0.832affected

Same product

jung-group: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-26235JUNG Smart Visu Server 1.1.1050 - 'JUNG Smart Visu Server' Missing Authentication
    35Monitor
  • CVE-2026-26234JUNG Smart Visu Server - Improper Neutralization of HTTP Headers for Scripting Syntax
    34Monitor
  • CVE-2017-20084JUNG Smart Visu Server KNX Group Address backdoor
    31Monitor
  • CVE-2017-20082JUNG Smart Visu Server backdoor
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
JUNG Smart Visu Server1.0.900 · descriptionVendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

  • T. WeberCyberDanube Security Research reported it to Delta Electronics.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-912 · Hidden Functionality

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records