Is CVE-2021-25666 in the CISA KEV catalog?

No. CVE-2021-25666 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-25666?

CVE-2021-25666 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2021-25666?

CVE-2021-25666 has an EPSS score of 0.69% (48th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-25666?

Upgrade scalance w740 firmware to 6.3 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-25666

MEDIUM

4.3

CVSS v3

NVD

Description

A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions < V6.3). Sending specially crafted packets through the ARP protocol to an affected device could cause a partial denial-of-service, preventing the device to operate normally for a short period of time.

CWE-770Allocation of Resources Without Limits or Throttling

How to fix

Remediation Available

scalance w740 firmwareNVD

Affected:< 6.3Fixed in:6.3CVE-2021-25666derived from NVD

scalance w780 firmwareNVD

Affected:< 6.3Fixed in:6.3CVE-2021-25666derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.69%probability of exploitation in 30 days

48thpercentile

Moderate risk: more likely to be exploited than 48% of all known CVEs.

References

Vendor Advisory1

cert-portal.siemens.com

Third-Party Advisory1

us-cert.cisa.gov

Related Vulnerabilities

Other CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-50387	High	7.5	100%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2019-11479	High	7.5	92%	-	Fix
CVE-2024-27316	High	7.5	91%	-	Fix
CVE-2022-30522	High	7.5	90%	-	Fix
CVE-2019-9515	High	7.5	88%	-	Fix

Embed a live status badge for CVE-2021-25666

Markdown

[![CVE-2021-25666](https://tridentstack.com/cve/badge/CVE-2021-25666.svg)](https://tridentstack.com/cve/CVE-2021-25666)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-25666"><img src="https://tridentstack.com/cve/badge/CVE-2021-25666.svg" alt="CVE-2021-25666"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.