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8 vulnerabilities found for Zimbra Collaboration Suite by Zimbra
CVE-2026-50055 (GCVE-0-2026-50055)
Vulnerability from nvd – Published: 2026-10-08 16:25 – Updated: 2026-10-08 19:10
VLAI
EPSS
VEX
Title
Zimbra Collaboration Suite Sieve Notify Filter Action Bypasses Mail Forwarding Restriction via Variable Expansion
Summary
A policy-enforcement flaw in Zimbra Collaboration Suite allows an authenticated user to bypass disabled mail forwarding by using a Sieve notify action to send copies of email content and headers to an arbitrary address.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 19:10 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite |
Affected:
0 , < 10.1.20
(semver)
|
Date Public
2026-10-08 16:20
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CVE-2026-50054 (GCVE-0-2026-50054)
Vulnerability from nvd – Published: 2026-10-08 16:25 – Updated: 2026-10-08 19:10
VLAI
EPSS
VEX
Title
Zimbra Collaboration Suite GrantRightsRequest SOAP Handler Allows Self-Granting of Undocumented loginAs Mailbox Delegation Right
Summary
An authorization flaw in Zimbra Collaboration Suite’s GrantRightsRequest allows an attacker with access to an authenticated account to grant another local account the loginAs right, creating persistent mailbox access and mail-sending authority that survives password changes and session expiry.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 19:10 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite |
Affected:
0 , < 10.1.20
(semver)
|
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CVE-2026-10631 (GCVE-0-2026-10631)
Vulnerability from nvd – Published: 2026-10-08 16:25 – Updated: 2026-10-08 19:11
VLAI
EPSS
VEX
Title
Zimbra Collaboration Suite EWS Extension Authorization Bypass via Crafted Composite Folder/Item Identifier
Summary
An authorization bypass in the EWS FindItem handler of Zimbra Collaboration Suite 10.1.0 through 10.1.19 allows an authenticated user with EWS enabled to read complete mailbox items, including raw MIME and attachments, from arbitrary local accounts without a share or delegation grant.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 19:11 UTC
CWE
- CWE-639 - Authorization bypass through User-Controlled key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite |
Affected:
0 , < 10.1.20
(semver)
|
Date Public
2026-10-08 16:16
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CVE-2025-71275 (GCVE-0-2025-71275)
Vulnerability from nvd – Published: 2026-03-24 15:21 – Updated: 2026-03-25 15:39
VLAI
EPSS
VEX
This CVE was rejected due to being a duplicate of CVE-2024-45519.
Show details on NVD website{
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CVE-2026-50055 (GCVE-0-2026-50055)
Vulnerability from cvelistv5 – Published: 2026-10-08 16:25 – Updated: 2026-10-08 19:10
VLAI
EPSS
VEX
Title
Zimbra Collaboration Suite Sieve Notify Filter Action Bypasses Mail Forwarding Restriction via Variable Expansion
Summary
A policy-enforcement flaw in Zimbra Collaboration Suite allows an authenticated user to bypass disabled mail forwarding by using a Sieve notify action to send copies of email content and headers to an arbitrary address.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 19:10 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite |
Affected:
0 , < 10.1.20
(semver)
|
Date Public
2026-10-08 16:20
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CVE-2026-50054 (GCVE-0-2026-50054)
Vulnerability from cvelistv5 – Published: 2026-10-08 16:25 – Updated: 2026-10-08 19:10
VLAI
EPSS
VEX
Title
Zimbra Collaboration Suite GrantRightsRequest SOAP Handler Allows Self-Granting of Undocumented loginAs Mailbox Delegation Right
Summary
An authorization flaw in Zimbra Collaboration Suite’s GrantRightsRequest allows an attacker with access to an authenticated account to grant another local account the loginAs right, creating persistent mailbox access and mail-sending authority that survives password changes and session expiry.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 19:10 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite |
Affected:
0 , < 10.1.20
(semver)
|
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CVE-2026-10631 (GCVE-0-2026-10631)
Vulnerability from cvelistv5 – Published: 2026-10-08 16:25 – Updated: 2026-10-08 19:11
VLAI
EPSS
VEX
Title
Zimbra Collaboration Suite EWS Extension Authorization Bypass via Crafted Composite Folder/Item Identifier
Summary
An authorization bypass in the EWS FindItem handler of Zimbra Collaboration Suite 10.1.0 through 10.1.19 allows an authenticated user with EWS enabled to read complete mailbox items, including raw MIME and attachments, from arbitrary local accounts without a share or delegation grant.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 19:11 UTC
CWE
- CWE-639 - Authorization bypass through User-Controlled key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite |
Affected:
0 , < 10.1.20
(semver)
|
Date Public
2026-10-08 16:16
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CVE-2025-71275 (GCVE-0-2025-71275)
Vulnerability from cvelistv5 – Published: 2026-03-24 15:21 – Updated: 2026-03-25 15:39
VLAI
EPSS
VEX
This CVE was rejected due to being a duplicate of CVE-2024-45519.
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