CVE Record
[ CRITICAL ]CVE-2021-44515
Zoho Desktop Central Authentication Bypass Vulnerability
Zoho Desktop Central contains an authentication bypass vulnerability that could allow an attacker to execute arbitrary code in the Desktop Central MSP server.
- Vendor
- Zoho
- Product
- Desktop Central
- CVSS
- 9.8
- EPSS (exploit probability)
- 99.9%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2021-44515 being exploited?
Yes. CISA added CVE-2021-44515 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 99.9% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-21. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (14 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Zoho CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2022-28810 Zoho ManageEngine ADSelfService Plus Remote Code Execution Vulnerability | [ MEDIUM ] | 6.8 | 71.0% | |
| CVE-2022-47966 Zoho ManageEngine Multiple Products Remote Code Execution Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 99.8% | |
| CVE-2022-35405 Zoho ManageEngine Multiple Products Remote Code Execution Vulnerability | [ CRITICAL ] | 9.8 | 99.9% | |
| CVE-2021-44077 Zoho ManageEngine ServiceDesk Plus Remote Code Execution Vulnerability | [ CRITICAL ] | 9.8 | 93.3% | |
| CVE-2021-37415 Zoho ManageEngine ServiceDesk Authentication Bypass Vulnerability | [ CRITICAL ] | 9.8 | 99.8% | |
| CVE-2021-40539 Zoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 99.0% | |
| CVE-2020-10189 Zoho ManageEngine Desktop Central File Upload Vulnerability | [ CRITICAL ] | 9.8 | 99.9% | |
| CVE-2019-8394 Zoho ManageEngine ServiceDesk Plus (SDP) File Upload Vulnerability | [ MEDIUM ] | 6.5 | 63.3% |