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CVE-2022-27924

Synacor Zimbra Collaboration Suite (ZCS) Command Injection

7.5 HIGHActively exploited (CISA KEV)Used in ransomwareEPSS 93.9%
  1. Published20 Apr 2022
  2. Added to CISA KEV4 Aug 2022
  3. Remediation due25 Aug 2022
Actively exploited (CISA KEV)

Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to inject memcache commands into a targeted instance which causes an overwrite of arbitrary cached entries.

Added to KEV: 4 Aug 2022Federal remediation due: 25 Aug 2022Used in ransomware

Description

Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to inject arbitrary memcache commands into a targeted instance. These memcache commands becomes unescaped, causing an overwrite of arbitrary cached entries.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

Synacor Zimbra Collaboration Suite8.8.15 · 9.0.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2022-27924 being actively exploited?

Yes. CVE-2022-27924 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 4 Aug 2022. It has been used in ransomware campaigns.

How severe is CVE-2022-27924?

CVE-2022-27924 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 93.9% probability of exploitation.

Which products are affected by CVE-2022-27924?

Affected products include Synacor Zimbra Collaboration Suite.

How do I fix CVE-2022-27924?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2022-27924 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.