26 September 2026
Reference: CVE-2022-27925
1. What is being reported?
The vulnerability affects certain versions of Zimbra Collaboration software used for email and messaging. It involves a feature that imports files from ZIP archives. An administrator user could exploit this to upload files outside the intended folders, potentially gaining unauthorised access to the system.
2. What this means in plain English
If an attacker gains administrator access, they could use this flaw to place harmful files on your system, possibly leading to email tampering or data theft. This could disrupt your business operations or damage your organisation's reputation.
3. Could this affect a small business?
Small organisations using Zimbra Collaboration versions 8.8.15 or 9.0 could be affected, especially if they have administrator users. If you do not use Zimbra or have strict controls on admin access, you are less likely to be impacted.
4. What to do now
- Check if your organisation uses Zimbra Collaboration software, and identify the version.
- Ensure only trusted staff have administrator access to your email system.
- Contact your IT provider or software supplier to confirm if this vulnerability affects your setup and ask about available updates or patches.
- Monitor your email system for unusual activity and review access logs regularly.
5. Ask your IT provider
Can you confirm if our Zimbra Collaboration software is affected by CVE-2022-27925, and what steps are needed to protect us from this vulnerability?
6. Bottom line
If you use Zimbra Collaboration, act quickly to check your version and secure administrator access to prevent potential email system compromise.
Information based on CISA KEV, NVD, and reputable security reporting.