CVE-2021-25740

lowpriority · track · 13OT risk · elevatedEPSS 0.020 · 80 %ileDEEUFRRUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.95% (80th) EPSS
CVSS 3.5 · low
Is it mine?
8 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A security issue was discovered with Kubernetes that could enable users to send network traffic to locations they would otherwise not have access to via a confused deputy attack.

01

cvss

Technical severity, 0–10. One row per scoring source.

3.5
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.03.5lowAV:N/AC:M/Au:S/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 6.8 · impact 2.9
v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 1.6 · impact 1.4
v3.13.1lowAV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU
v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · ENISA EU
v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · jordan@liggitt.netexploitability 1.6 · impact 1.4
v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · OSV
v3.12.9lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-610USprimaryCWE-441USCWE-441USCWE-610USCWE-863US
03

affected products (8)

Products and version ranges known to be affected.

04

advisories (3)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2023-0019Kubernetes: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2021-07-14csaf · cert_bundDE

    Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Kubernetes ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

  • GHSA-vw47-mr44-3jf9Confused Deputy in Kubernetes2021-09-21ghsa · osvUS

    A security issue was discovered with Kubernetes that could enable users to send network traffic to locations they would otherwise not have access to via a confused deputy attack.

  • CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
05

also known as (4)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundnvdosvcertfrNVDCVE.orgMITRE
published 2021-09-20modified 2026-06-17
08

references (15)

External citations — patches, advisories, analysis.

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