--- title: "Zimbra zm-zcs-lib vulnerabilities and CVEs" url: https://radicalnotion.ai/vendor/zimbra/zm-zcs-lib type: product description: "Zimbra zm-zcs-lib has 12 published CVEs, 5 in CISA KEV and 9 with public exploits." updated: 2026-10-23 source: RadicalNotion.AI license: CC BY-NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/) --- # Zimbra zm-zcs-lib vulnerabilities Vendor: [Zimbra](https://radicalnotion.ai/vendor/zimbra) - **Published CVEs:** 12 - **In CISA KEV:** 5 - **With a public exploit:** 9 - **With a patch:** 4 - **Average CVSS:** 6.6 - **First CVE:** 2018-03-27 - **Latest CVE:** 2026-10-23 ## Severity breakdown | Severity | CVEs | | --- | --- | | Critical | 0 | | High | 5 | | Medium | 7 | | Low | 0 | | Unscored | 0 | ## Most common weakness types | CWE | Name | CVEs | | --- | --- | --- | | [CWE-352](https://radicalnotion.ai/cwe/cwe-352) | Cross-Site Request Forgery (CSRF) | 2 | | [CWE-79](https://radicalnotion.ai/cwe/cwe-79) | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | 2 | | [CWE-639](https://radicalnotion.ai/cwe/cwe-639) | Authorization Bypass Through User-Controlled Key | 1 | | [CWE-682](https://radicalnotion.ai/cwe/cwe-682) | Incorrect Calculation | 1 | | [CWE-74](https://radicalnotion.ai/cwe/cwe-74) | Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') | 1 | | [CWE-78](https://radicalnotion.ai/cwe/cwe-78) | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | 1 | | [CWE-90](https://radicalnotion.ai/cwe/cwe-90) | Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') | 1 | | [CWE-116](https://radicalnotion.ai/cwe/cwe-116) | Improper Encoding or Escaping of Output | 1 | ## CVEs by year | Year | CVEs published | | --- | --- | | 2018 | 1 | | 2019 | 0 | | 2020 | 0 | | 2021 | 0 | | 2022 | 3 | | 2023 | 0 | | 2024 | 0 | | 2025 | 0 | | 2026 | 8 | ## Affected versions (top 12 of 52) | Version | Kind | CVEs | | --- | --- | --- | | 10.0.0-GA | exact | 8 | | 10.1.0 | exact | 8 | | 10.1.1 | exact | 8 | | 10.1.4 | exact | 8 | | 8.7.6 | exact | 8 | | 8.7.7 | exact | 8 | | 8.8.2 | exact | 8 | | 8.8.3 | exact | 8 | | 8.8.4 | exact | 8 | | 8.8.5 | exact | 8 | | 8.8.6 | exact | 8 | | 10.0.0 | exact | 7 | ## CVEs | CVE | Title | Severity | CVSS | CISA KEV | Public exploit | Patch | | --- | --- | --- | --- | --- | --- | --- | | CVE-2026-115786 | Zimbra Collaboration Suite Shared-File Mailbox Quota Accounting Error Enables Quota Exhaustion | medium | 6.5 | No | No | No | | CVE-2026-115785 | Zimbra Collaboration Suite Data Source Test SMTP Command Injection via Unsanitized Email Address | medium | 4.3 | No | No | No | | CVE-2026-93636 | Zimbra Collaboration Suite LDAP Filter Injection via Calendar Resource Attribute Name | medium | 4.3 | No | Yes | No | | CVE-2026-93634 | Zimbra Collaboration Suite Cross-Account Authorization Bypass via Forged Shared-File Records | medium | 4.3 | No | Yes | No | | CVE-2026-93633 | Zimbra Collaboration Suite Briefcase CSS Sanitization Bypass via Non-ASCII Stylesheet Characters | medium | 5.4 | No | Yes | No | | CVE-2026-93631 | Zimbra Collaboration Suite OAuth Extension Cross-Site Request Forgery Enables Account Linking | high | 7.1 | No | Yes | No | | CVE-2026-73570 | A remote code execution vulnerability exists in Zimbra Collaboration (ZCS) before 10.1.20 when... | high | 8.9 | Yes | Yes | Yes | | CVE-2026-33373 | - | high | 8.8 | No | No | Yes | | CVE-2022-27925 | - | high | 8.6 | Yes | Yes | No | | CVE-2022-27924 | - | high | 8.7 | Yes | Yes | No | | CVE-2022-24682 | - | medium | 6.4 | Yes | Yes | Yes | | CVE-2018-6882 | - | medium | 6.3 | Yes | Yes | Yes | ## Frequently asked questions ### How many CVEs does Zimbra zm-zcs-lib have? Zimbra zm-zcs-lib has 12 published CVE records since 2018. ### How many Zimbra zm-zcs-lib CVEs are in CISA KEV? 5 of Zimbra zm-zcs-lib's CVEs are listed in CISA's Known Exploited Vulnerabilities catalog, confirmed exploited in the wild and carrying a CISA remediation deadline. ### Are there public exploits for Zimbra zm-zcs-lib vulnerabilities? Yes — 9 of Zimbra zm-zcs-lib's CVEs have a known public exploit. ### Which versions of Zimbra zm-zcs-lib are affected? 52 distinct Zimbra zm-zcs-lib versions are named across its CVEs. Use the version filter above to see the CVEs affecting a specific version. ### What are the most common weakness types in Zimbra zm-zcs-lib CVEs? Zimbra zm-zcs-lib's CVEs most often map to these CWE weakness types: CWE-352 (Cross-Site Request Forgery (CSRF)), CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')), CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-682 (Incorrect Calculation). ### What is the average severity of Zimbra zm-zcs-lib CVEs? The average CVSS base score across Zimbra zm-zcs-lib's scored CVEs is 6.6. ## Other products from this vendor - [zm-build](https://radicalnotion.ai/vendor/zimbra/zm-build) (114 CVEs) - [Collaboration](https://radicalnotion.ai/vendor/zimbra/collaboration) (50 CVEs) - [Zimbra Collaboration Suite](https://radicalnotion.ai/vendor/zimbra/zimbra-collaboration-suite) (25 CVEs) - [zm-mailbox](https://radicalnotion.ai/vendor/zimbra/zm-mailbox) (19 CVEs) - [zm-zcs](https://radicalnotion.ai/vendor/zimbra/zm-zcs) (11 CVEs) - [Zimbra Collaboration Suite (ZCS)](https://radicalnotion.ai/vendor/zimbra/zimbra-collaboration-suite-zcs) (7 CVEs) - [collaboration server](https://radicalnotion.ai/vendor/zimbra/collaboration-server) (6 CVEs) - [Zimbra](https://radicalnotion.ai/vendor/zimbra/zimbra) (5 CVEs) --- Source: [RadicalNotion.AI](https://radicalnotion.ai/vendor/zimbra/zm-zcs-lib). Licensed CC BY-NC 4.0; attribute RadicalNotion.AI and link the source page when you reuse this data.