REST API Authentication Bypass in Zoho ManageEngine ADSelfService Plus
CVE-2021-40539
Key Information:
- Vendor
Zohocorp
- Vendor
- CVE Published:
- 7 September 2021
Badges
What is CVE-2021-40539?
Zoho ManageEngine ADSelfService Plus versions 6113 and earlier are affected by a security flaw that allows an attacker to bypass REST API authentication mechanisms, potentially leading to remote code execution. This vulnerability could allow unauthorized users to gain access to sensitive functionalities, risking data integrity and confidentiality. Users are encouraged to upgrade to the latest versions and apply security patches to mitigate this risk. Additional details and mitigation strategies can be found through the official Zoho resources.
CISA has reported CVE-2021-40539
CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2021-40539 as being exploited and is known by the CISA as enabling ransomware campaigns.
The CISA's recommendation is: Apply updates per vendor instructions.
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
EPSS Score
94% chance of being exploited in the next 30 days.
CVSS V3.1
Timeline
- 🟡
Public PoC available
- 💰
Used in Ransomware
- 👾
Exploit known to exist
- 🦅
CISA Reported
Vulnerability published
Vulnerability Reserved