CODESYS Control RTE 3.5.22.0 HTTP Request improper validation of specified quantity in input

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.
7.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in CODESYS Control RTE, Control RTE SL, Control Win, HMI, Runtime Toolkit, Control for BeagleBone SL, Control for emPC-A, iMX6 SL, Control for IOT2000 SL, Control for Linux ARM SL, Control for Linux SL, Control for PFC100 SL, Control for PFC200 SL, Control for PLCnext SL, Control for Raspberry Pi SL, Control for WAGO Touch Panels 600 SL and Virtual Control SL. Impacted is an unknown function of the component HTTP Request Handler. Such manipulation leads to improper validation of specified quantity in input. This vulnerability is uniquely identified as CVE-2026-8047. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in CODESYS Control RTE, Control RTE SL, Control Win, HMI, Runtime Toolkit, Control for BeagleBone SL, Control for emPC-A, iMX6 SL, Control for IOT2000 SL, Control for Linux ARM SL, Control for Linux SL, Control for PFC100 SL, Control for PFC200 SL, Control for PLCnext SL, Control for Raspberry Pi SL, Control for WAGO Touch Panels 600 SL and Virtual Control SL and classified as critical. Affected by this issue is some unknown functionality of the component HTTP Request Handler. The manipulation with an unknown input leads to a improper validation of specified quantity in input vulnerability. Using CWE to declare the problem leads to CWE-1284. The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties. Impacted is availability. CVE summarizes:

The affected products perform improper length checking when parsing incoming HTTP requests, resulting in a size-limited out-of-bounds write. An unauthenticated remote attacker can exploit this flaw to cause a denial of service via a system crash on the affected device.

The advisory is shared for download at certvde.com. This vulnerability is handled as CVE-2026-8047 since 05/06/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 3.5.22.20 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-31800) and CERT Bund (WID-SEC-2026-1675). Once again VulDB remains the best source for vulnerability data.

Affected

  • CODESYS CODESYS

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (CERTVDE): 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper validation of specified quantity in input
CWE: CWE-1284 / CWE-703
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Control RTE/Control RTE SL/Control Win/HMI/Runtime Toolkit/Control for BeagleBone SL/Control for emPC-A/iMX6 SL/Control for IOT2000 SL/Control for Linux ARM SL/Control for Linux SL/Control for PFC100 SL/Control for PFC200 SL/Control for PLCnext SL/Control for Raspberry Pi SL/Control for WAGO Touch Panels 600 SL/Virtual Control SL 3.5.22.20

Timelineinfo

05/06/2026 CVE reserved
05/26/2026 +20 days Advisory disclosed
05/26/2026 +0 days VulDB entry created
05/27/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: VDE-2026-057
Status: Confirmed

CVE: CVE-2026-8047 (🔒)
GCVE (CVE): GCVE-0-2026-8047
GCVE (VulDB): GCVE-100-365612
EUVD: 🔒
CERT Bund: WID-SEC-2026-1675 - CODESYS: Mehrere Schwachstellen

Entryinfo

Created: 05/26/2026 11:40
Updated: 05/27/2026 10:14
Changes: 05/26/2026 11:40 (77), 05/26/2026 13:56 (1), 05/27/2026 10:14 (7)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!