CVE-2021-28994
7.5 · HIGHOverview
CVE-2021-28994 is a high-severity vulnerability affecting kopano groupware_core. It was published on March 31, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
kopano-ical (formerly zarafa-ical) in Kopano Groupware Core through 8.7.16, 9.x through 9.1.0, 10.x through 10.0.7, and 11.x through 11.0.1 and Zarafa 6.30.x through 7.2.x allows memory exhaustion via long HTTP headers.
Remediation
Check the references section for vendor advisories and patches from kopano. Update groupware_core to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| kopano | groupware_core | 0 | Affected |
| zarafa | zarafa | 6.30.0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-28994?
CVE-2021-28994 is a high-severity vulnerability affecting kopano groupware_core. It was published on March 31, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-28994?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-28994?
Check the references section for vendor advisories and patches from kopano. Update groupware_core to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-28994?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-28994 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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