What is the CVSS score of CVE-2018-7779?

CVE-2018-7779 has a CVSS 3.0 base score of 7.5 (High). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 1.4%.

Homelynk Firmware CVE-2018-7779

HIGH

2018-07-03 cybersecurity@se.com

Authentication Bypass Schneider Electric Homelynk Firmware Spacelynk Firmware Wiser For Knx Firmware

7.5

CVSS 3.0 · NVD

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Vulnerability Assessment

Impact	CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 1.4% exploitation probability (EPSS)

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AnalysisAI

In Schneider Electric Wiser for KNX V2.1.0 and prior, homeLYnk V2.0.1 and prior; and spaceLYnk V2.1.0 and prior, weak and unprotected FTP access could allow an attacker unauthorized access. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

In Schneider Electric Wiser for KNX V2.1.0 and prior, homeLYnk V2.0.1 and prior; and spaceLYnk V2.1.0 and prior, weak and unprotected FTP access could allow an attacker unauthorized access. Affected products include: Schneider-Electric Homelynk Firmware, Schneider-Electric Spacelynk Firmware, Schneider-Electric Wiser For Knx Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

DescriptionNVD

In Schneider Electric Wiser for KNX V2.1.0 and prior, homeLYnk V2.0.1 and prior; and spaceLYnk V2.1.0 and prior, weak and unprotected FTP access could allow an attacker unauthorized access.

Threat Intelligence Overview

EPSS Score

1.4%

Top 31% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 1.4%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:o:schneider-electric:homelynk_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:spacelynk_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:wiser_for_knx_firmware:*:*:*:*:*:*:*:*

More in Homelynk Firmware

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Use of a Broken or Risky Cryptographic Algorithm vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 an

CVE-2021-22737 CRITICAL Act Now

9.8 May 26

Insufficiently Protected Credentials vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior that

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Improper Privilege Management vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior which could

CVE-2021-22732 HIGH This Week

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Improper Privilege Management vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior which could

CVE-2021-22736 HIGH This Week

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Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists in homeLYnk (Wiser F

CVE-2021-22735 HIGH This Week

7.2 May 26

Improper Verification of Cryptographic Signature vulnerability exists inhomeLYnk (Wiser For KNX) and spaceLYnk V2.60 and

CVE-2021-22734 HIGH This Week

7.2 May 26

Improper Verification of Cryptographic Signature vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 an

CVE-2021-22740 MEDIUM This Month

6.5 May 26

Information Exposure vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior which could cause in

CVE-2021-22739 MEDIUM This Month

5.9 May 26

Information Exposure vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior which could cause a

Same technique Authentication Bypass

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References

Advisories & patches

ADVISORY https://www.schneider-electric.com/en/download/document/SEVD-2018-109-02/

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

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