VDB-185416 · CVE-2021-34585 · GCVE-0-2021-34585

CODESYS V2 Web Server prior 1.1.9.22 Web Request unusual condition

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.7	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic was found in CODESYS V2 Web Server. Affected by this vulnerability is an unknown functionality of the component Web Request Handler. Executing a manipulation can lead to unusual condition. This vulnerability is handled as CVE-2021-34585. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in CODESYS V2 Web Server (Web Server). It has been declared as problematic. This vulnerability affects an unknown function of the component Web Request Handler. The manipulation with an unknown input leads to a unusual condition vulnerability. The CWE definition for the vulnerability is CWE-754. The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product. As an impact it is known to affect availability.

The weakness was released 10/26/2021. The advisory is shared for download at customers.codesys.com. This vulnerability was named CVE-2021-34585 since 06/10/2021. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.1.9.22 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Web Server

Vendor

CODESYS

Name

V2 Web Server

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (CERT@VDE): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Unusual condition
CWE: CWE-754
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: V2 Web Server 1.1.9.22

Timelineinfo

06/10/2021 🔍
10/26/2021 +138 days 🔍
10/26/2021 +0 days 🔍
08/15/2025 +1389 days 🔍

Sourcesinfo

Advisory: customers.codesys.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-34585 (🔍)
GCVE (CVE): GCVE-0-2021-34585
GCVE (VulDB): GCVE-100-185416

Entryinfo

Created: 10/26/2021 15:30
Updated: 08/15/2025 23:03
Changes: 10/26/2021 15:30 (49), 10/30/2021 15:58 (2), 10/30/2021 16:03 (7), 08/15/2025 23:03 (26)
Complete: 🔍
Cache ID: 216::103