Skip to main content

0852 0303 Firmware CVE-2021-20998

CRITICAL
Missing Authentication for Critical Function (CWE-306)
2021-05-13 info@cert.vde.com
Authentication Bypass 0852 0303 Firmware 0852 1305 Firmware 0852 1505 Firmware 0852 1305 000 001 Firmware 0852 1505 000 001 Firmware
9.8
CVSS 3.1 · NVD
Share

Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

1
CVE Published
May 13, 2021 - 14:15 nvd
CRITICAL 9.8

DescriptionNVD

In multiple managed switches by WAGO in different versions without authorization and with specially crafted packets it is possible to create users.

AnalysisAI

In multiple managed switches by WAGO in different versions without authorization and with specially crafted packets it is possible to create users. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Missing Authentication for Critical Function (CWE-306), which allows attackers to access critical functionality without authentication. In multiple managed switches by WAGO in different versions without authorization and with specially crafted packets it is possible to create users. Affected products include: Wago 0852-0303 Firmware, Wago 0852-1305 Firmware, Wago 0852-1505 Firmware, Wago 0852-1305\/000-001 Firmware, Wago 0852-1505\/000-001 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Require authentication for all sensitive operations, implement defense in depth.

More in 0852 0303 Firmware

View all
CVE-2021-20997 HIGH
7.5 May 13

In multiple managed switches by WAGO in different versions it is possible to read out the password hashes of all Web-bas
CVE-2021-20995 HIGH
7.5 May 13

In multiple managed switches by WAGO in different versions the webserver cookies of the web based UI contain user creden
CVE-2021-20994 MEDIUM
6.1 May 13

In multiple managed switches by WAGO in different versions an attacker may trick a legitimate user to click a link to in
CVE-2021-20996 MEDIUM
5.3 May 13

In multiple managed switches by WAGO in different versions special crafted requests can lead to cookies being transferre
CVE-2021-20993 MEDIUM
5.3 May 13

In multiple managed switches by WAGO in different versions the activated directory listing provides an attacker with the

Same weakness CWE-306 – Missing Authentication for Critical Function

View all
CVE-2017-10271 HIGH POC
7.5
CVE-2025-3248 CRITICAL POC
9.8
CVE-2024-11680 CRITICAL POC
9.8
CVE-2025-0108 HIGH POC
8.8
CVE-2025-32433 CRITICAL POC
10.0
CVE-2016-2004 CRITICAL POC
9.8
CVE-2024-46506 CRITICAL POC
10.0
CVE-2025-8943 CRITICAL POC
9.8

Same technique Authentication Bypass

View all
CVE-2023-22515 CRITICAL POC
9.8
CVE-2012-4681 CRITICAL POC
9.8
CVE-2013-2465 CRITICAL POC
9.8
CVE-2011-3544 CRITICAL POC
9.8
CVE-2012-1723 CRITICAL POC
9.8
CVE-2017-10271 HIGH POC
7.5
CVE-2015-1427 CRITICAL POC
9.8
CVE-2025-3248 CRITICAL POC
9.8

Share

CVE-2021-20998 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy