CVE-2026-73575: In Zimbra Collaboration (ZCS) before 10.1.17, a Cross-Site Request Forgery (CSRF) vulnerability exists in the

Q: How do I fix CVE-2026-73575?

zimbra collaboration suite: upgrade to 10.1.17. Exact commands for each OS are on this page.

Q: Is CVE-2026-73575 being exploited?

CVE-2026-73575 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-73575 affect?

CVE-2026-73575 affects zimbra collaboration suite. Severity is low (CVSS 3.1). In Zimbra Collaboration (ZCS) before 10.1.17, a Cross-Site Request Forgery (CSRF) vulnerability exists in the Exchange Web Services (EWS) endpoint of Zimbra Collaboration (ZCS) due to insufficient validation of request content types. An att

Q: How urgent is CVE-2026-73575?

Priority 12/100. No elevated risk signals yet.

Routine

LOW 3.1UPGRADE

CVE-2026-73575 is a low-severity flaw (CVSS 3.1) affecting zimbra collaboration suite. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Zimbra Collaboration (ZCS) before 10.1.17, a Cross-Site Request Forgery (CSRF) vulnerability exists in the Exchange Web Services (EWS) endpoint of Zimbra Collaboration (ZCS) due to insufficient validation of request content types. An attacker can exploit this vulnerability by causing an authenticated user to submit a crafted request, potentially allowing unauthorized actions to be performed on behalf of the victim.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.1 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 96%)
CISA exploited list	No
Weakness	CWE-352
Published	2026-08-13
Last modified	2026-08-28

Publisher (CNA): MITRE · Vendor: synacor

Last updated 2026-08-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-13 16:19 UTCPublished CVE record published
2026-08-28 13:17 UTCUpdated Record last modified

synacor zimbra collaboration suite UPGRADE

Affected: < 10.1.17

Fixed in: 10.1.17

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy zimbra-collaboration-suite || rpm -q zimbra-collaboration-suite || zimbra-collaboration-suite --version

2. UPGRADE to 10.1.17 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zimbra-collaboration-suite

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zimbra-collaboration-suite

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-73575?

zimbra collaboration suite: upgrade to 10.1.17. Exact commands for each OS are on this page.

Is CVE-2026-73575 being exploited?

CVE-2026-73575 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-73575 affect?

CVE-2026-73575 affects zimbra collaboration suite. Severity is low (CVSS 3.1). In Zimbra Collaboration (ZCS) before 10.1.17, a Cross-Site Request Forgery (CSRF) vulnerability exists in the Exchange Web Services (EWS) endpoint of Zimbra Collaboration (ZCS) due to insufficient validation of request content types. An att

How urgent is CVE-2026-73575?

Priority 12/100. No elevated risk signals yet.

Software pages

Zimbra vulnerabilities

Related CVEs

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CVE-2026-73573 LOW 3.1 UPGRADE In Zimbra Collaboration (ZCS) before 10.1.17, a path traversal vulnerability exists in the Zimbra Briefcase do
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References

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