CVE-2021-21001

mediumpriority · track · 26EPSS 0.011 · 66 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.13% (66th) EPSS

CVSS 4 · medium

Is it mine?

108 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · wago_psirt

EPSS · scored 2026-10-27

On WAGO PFC200 devices in different firmware versions with special crafted packets an authorised attacker with network access to the device can access the file system with higher privileges.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedwago_psirt
Endress+Hauser provides updated firmware versions for all related products from the Proline portfolio which fixes the vulnerability and recommends customers to update to the new fixed version. For support, please contact your local service center.
Mitigationwago_psirt
If an immediate firmware update is not possible, the WLAN on the unit can also be switched off as a precautionary measure.

cvss

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

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 4–9.1

v2.04mediumAV:N/AC:L/Au:S/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16.5mediumAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondary · info@cert.vde.comexploitability 2.3 · impact 6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nsecondary · WAGO PSIRT DE

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USprimaryCWE-22USCWE-22US

affected products (108)

Products and version ranges known to be affected.

WAGO Series Ethernet Controller750-8202/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8203/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8204/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8206/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8207/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8208/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8210/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8211/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8212/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8213/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8214/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8216/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series Ethernet Controller750-8217/xxx-xxx → 03.06.19 (18)enisa_euvdEU
WAGO Series PFC200 Controller≤ 750-862 ≤FW07enisa_euvdEU
WAGO Series PFC200 Controller≤ 750-832/000-00x ≤FW06enisa_euvdEU
WAGO Series PFC200 Controller≤ 750-885/0xx-xxx ≤FW14enisa_euvdEU
WAGO Series PFC200 Controller≤ 750-852 ≤FW14enisa_euvdEU
WAGO Series PFC200 Controller≤ 750-889 ≤FW14enisa_euvdEU
WAGO Series PFC200 Controller≤ 750-893 ≤FW07enisa_euvdEU
WAGO Series PFC200 Controller≤ 750-831/000-00x ≤FW14enisa_euvdEU

showing 20 of 108

advisories (1)

Vendor and ecosystem advisories describing this.

VDE-2021-014WAGO: Multiple Vulnerabilities in CODESYS Runtime 2.32021-05-20csaf · wago_psirtDE
Multiple vulnerabilities were reported in CODESYS 2.3 Runtime. The CODESYS 2.3 Runtime is an essential component in several WAGO PLC's.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu wago_psirt NVD CVE.org MITRE

published 2021-05-24modified 2026-06-17

related (12,528)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-104286US	—OT critical	4.57% (92nd)	KEV	2026-10-01
An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail…
CVE-2026-93616US	—OT critical	91.6% (100th)	KEV	2026-09-22
A directory traversal and file upload vulnerability allows an unauthenticated attacker to upload and execute arbitrary scripts on Check Point Management Server.
CVE-2026-85706US	—OT critical	97.4% (100th)	KEV	2026-09-12
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 18.11.12, 19.0 before 19.0.9, 19.1 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2…
CVE-2026-66384US	—OT critical	0.66% (52nd)	KEV	2026-08-12
An authenticated user may write data outside the intended Docker cache path under specific remote-repository conditions.
CVE-2026-59310US	—OT critical	2.56% (85th)	KEV	2026-07-30
VMware vCenter contains a directory traversal vulnerability in the Syslog server. A malicious actor with network access to vCenter may exploit this issue to execute arbitrary code.

+12523 more

references (3)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan