What is the CVSS score of CVE-2020-26140?

CVE-2020-26140 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.2%.

Ip Phone 8861 Firmware CVE-2020-26140

MEDIUM

Use of a Broken or Risky Cryptographic Algorithm (CWE-327)

2021-05-11 cve@mitre.org

6.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-327 OWASP Top 10:2025 A04:2025 - Cryptographic Failures ASVS 5.0 V11 - Cryptography Approved algorithm selection
Impact	CVSS score of 6.5 (MEDIUM). Attack characteristics: adjacent network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.16%.
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 0.2% exploitation probability (EPSS)

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AnalysisAI

An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. Rated medium severity (CVSS 6.5), this vulnerability is 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.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-327. An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The WEP, WPA, WPA2, and WPA3 implementations accept plaintext frames in a protected Wi-Fi network. An adversary can abuse this to inject arbitrary data frames independent of the network configuration. Affected products include: Alfa Awus036H Firmware, Siemens Scalance W1748-1 Firmware, Siemens Scalance W1750D Firmware, Siemens Scalance W1788-1 Firmware, Siemens Scalance W1788-2 Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.5 MEDIUM

AV:A/AC:L/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

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

DescriptionNVD

An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The WEP, WPA, WPA2, and WPA3 implementations accept plaintext frames in a protected Wi-Fi network. An adversary can abuse this to inject arbitrary data frames independent of the network configuration.

Threat Intelligence Overview

EPSS Score

0.2%

Top 64% 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 0.2%

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: 0

CVSS: +32

PoC: 0

Weaponized: 0

Threat intel: +10

Gov advisory: 0

Attack Technique

Code Injection CRITICAL

Code injection occurs when an application accepts user input and passes it directly into a language interpreter or evaluator without proper sanitization.

Affected Products (CPE)NVD

cpe:2.3:o:alfa:awus036h_firmware:6.1316.1209:*:*:*:*:windows_10:*:*

cpe:2.3:o:siemens:scalance_w1748-1_firmware:-:*:*:*:*:*:m12:*

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

cpe:2.3:o:siemens:scalance_w1788-1_firmware:-:*:*:*:*:*:m12:*

cpe:2.3:o:siemens:scalance_w1788-2_firmware:-:*:*:*:*:*:eec_m12:*

cpe:2.3:o:siemens:scalance_w1788-2_firmware:-:*:*:*:*:*:m12:*

cpe:2.3:o:siemens:scalance_w1788-2ia_firmware:-:*:*:*:*:*:m12:*

cpe:2.3:o:siemens:scalance_w721-1_firmware:-:*:*:*:*:*:rj45:*

cpe:2.3:o:siemens:scalance_w722-1_firmware:-:*:*:*:*:*:rj45:*

cpe:2.3:o:siemens:scalance_w734-1_firmware:-:*:*:*:*:*:rj45:*

cpe:2.3:o:siemens:scalance_w738-1_firmware:-:*:*:*:*:*:m12:*

cpe:2.3:o:siemens:scalance_w748-1_firmware:-:*:*:*:*:*:m12:*

cpe:2.3:o:siemens:scalance_w748-1_firmware:-:*:*:*:*:*:rj45:*

cpe:2.3:o:siemens:scalance_w761-1_firmware:-:*:*:*:*:*:rj45:*

cpe:2.3:o:siemens:scalance_w774-1_firmware:-:*:*:*:*:*:m12_eec:*

cpe:2.3:o:siemens:scalance_w774-1_firmware:-:*:*:*:*:*:rj45:*

cpe:2.3:o:siemens:scalance_w778-1_firmware:-:*:*:*:*:*:m12:*

cpe:2.3:o:siemens:scalance_w778-1_firmware:-:*:*:*:*:*:m12_eec:*

cpe:2.3:o:siemens:scalance_w786-1_firmware:-:*:*:*:*:*:rj45:*

cpe:2.3:o:siemens:scalance_w786-2_firmware:-:*:*:*:*:*:rj45:*

+ 184 more

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Same weakness CWE-327 – Use of a Broken or Risky Cryptographic Algorithm

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Threat IntelligenceMISP

CISA Advisories

ICSA-26-111-07

Sources: CISA (public domain)

References

Advisories & patches

ADVISORY https://vuldb.com/vuln/174905 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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