750 823 Firmware
CVE-2021-21000
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N/I:N/A:H
Lifecycle Timeline
1DescriptionNVD
On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.
AnalysisAI
On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Allocation of Resources Without Limits (CWE-770), which allows attackers to exhaust system resources through uncontrolled allocation. On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime. Affected products include: Wago 750-823 Firmware, Wago 750-829 Firmware, Wago 750-831 Firmware, Wago 750-832 Firmware, Wago 750-852 Firmware.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Set resource limits, implement rate limiting, validate input sizes.
More in 750 823 Firmware
View allCrafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service con
In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereference in the
In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Rated high sever
Crafted web server requests may cause a heap-based buffer overflow and could therefore trigger a denial-of- service cond
WAGO 750-88X and WAGO 750-89X Ethernet Controller devices, versions 01.09.18(13) and before, have XSS in the SNMP config
CODESYS V2 Web-Server before 1.1.9.20 has an Out-of-bounds Write. Rated critical severity (CVSS 9.8), this vulnerability
CODESYS V2 Web-Server before 1.1.9.20 has an Improperly Implemented Security Check. Rated critical severity (CVSS 9.8),
CODESYS V2 Web-Server before 1.1.9.20 has Improper Access Control. Rated critical severity (CVSS 9.8), this vulnerabilit
CODESYS V2 Web-Server before 1.1.9.20 has a Stack-based Buffer Overflow. Rated critical severity (CVSS 9.8), this vulner
CODESYS V2 runtime system SP before 2.4.7.55 has a Stack-based Buffer Overflow. Rated critical severity (CVSS 9.8), this
CODESYS V2 Web-Server before 1.1.9.20 has an Out-of-bounds Read. Rated critical severity (CVSS 9.1), this vulnerability
Improper Authentication vulnerability in WAGO 750-8XX series with FW version <= FW03 allows an attacker to change the se
Same technique Denial Of Service
View allShare
External POC / Exploit Code
Leaving vuln.today