What is the CVSS score of CVE-2020-26146?

CVE-2020-26146 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 1.5%.

Scalance W1750D Firmware CVE-2020-26146

MEDIUM

Improper Input Validation (CWE-20)

2021-05-11 cve@mitre.org

Information Disclosure Samsung Siemens Scalance W1750D Firmware C 100 Firmware C 110 Firmware C 120 Firmware C 130 Firmware C 200 Firmware C 230 Firmware C 235 Firmware C 250 Firmware C 260 Firmware C 65 Firmware C 75 Firmware O 105 Firmware O 90 Firmware W 118 Firmware W 68 Firmware Scalance W700 Ieee 802 11N Firmware Galaxy I9305 Firmware Scalance W1700 Ieee 802 11Ac Firmware Arista

5.3

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-20 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V2 - Validation and Business Logic Input validation, allowlisting
Impact	CVSS score of 5.3 (MEDIUM). Attack characteristics: adjacent network attack vector, high complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 1.51%.
Exploit ScenarioDerived	Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 1.5% exploitation probability (EPSS)

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AnalysisAI

An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. Rated medium severity (CVSS 5.3), this vulnerability is no authentication required. 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.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-20. An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WPA, WPA2, and WPA3 implementations reassemble fragments with non-consecutive packet numbers. An adversary can abuse this to exfiltrate selected fragments. This vulnerability is exploitable when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. Note that WEP is vulnerable to this attack by design. Affected products include: Samsung Galaxy I9305 Firmware, Arista C-250 Firmware, Arista C-260 Firmware, Arista C-230 Firmware, Arista C-235 Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.3 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

DescriptionCVE.org

An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WPA, WPA2, and WPA3 implementations reassemble fragments with non-consecutive packet numbers. An adversary can abuse this to exfiltrate selected fragments. This vulnerability is exploitable when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. Note that WEP is vulnerable to this attack by design.

Threat Intelligence Overview

EPSS Score

1.5%

Top 19% exploitable

Threat Intel

1 source

Data Quality

6 sources

Confidence: High

NVD

CVE.org

EPSS CISA

GitHub

VulDB

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 MEDIUM

CISA KEV No

Public POC No

EPSS 1.5%

Patch available No

Active threat Yes

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

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

Controlled

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +2

CVSS: +26

PoC: 0

Weaponized: 0

Threat intel: +10

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:o:samsung:galaxy_i9305_firmware:4.4.4:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-250_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-260_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-230_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-235_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-200_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-120_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-130_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-100_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-110_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:o-105_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:w-118_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-75_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:arista:o-90_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:arista:c-65_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:arista:w-68_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:siemens:scalance_w700_ieee_802.11n_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:scalance_w1700_ieee_802.11ac_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:scalance_w1750d_firmware:*:*:*:*:*:*:*:*

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Threat IntelligenceMISP

CISA Advisories

ICSA-26-111-07

Sources: CISA (public domain)

References

Advisories & patches

ADVISORY https://vuldb.com/vuln/174909 REF http://www.openwall.com/lists/oss-security/2021/05/11/12 REF https://cert-portal.siemens.com/productcert/html/ssa-019200.html REF https://cert-portal.siemens.com/productcert/html/ssa-913875.html REF https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf REF https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md REF https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu REF https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63 REF https://www.fragattacks.com

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