Security readout for executives and security teams
Plain-English summary
This flaw affects Zimbra Collaboration 8.8.15 and 9.0. An unauthenticated attacker can tamper with cached server entries by injecting memcache commands. Because CISA lists it in KEV, treat exposed Zimbra systems as urgent until patch status and vendor guidance are confirmed.
Executive priority
Prioritize within the active-exploitation queue. Email platforms are high-value infrastructure, and this issue allows unauthenticated integrity tampering. Confirm exposure quickly, patch per Zimbra guidance, and document closure for KEV governance.
Technical view
CVE-2022-27924 is a CWE-74 injection issue in Zimbra Collaboration. The CVE description says arbitrary memcache commands can become unescaped and overwrite arbitrary cached entries. CVSS 3.1 is 7.5, network-accessible, low complexity, no privileges, no user interaction, with high integrity impact.
Likely exposure
Likely exposure is limited to organizations running Zimbra Collaboration 8.8.15 or 9.0, especially internet-facing mail and collaboration servers. The provided affected-product metadata is incomplete, but the CVE description names those versions.
Exploitation context
CISA KEV status supports that this vulnerability has been exploited in the wild. The provided sources do not describe exploit volume, threat actors, targets, or whether exploitation was standalone or chained with other Zimbra issues.
Researcher notes
Evidence supports unauthenticated network injection into memcache command handling with arbitrary cached-entry overwrite. The bundle does not provide low-level root cause details, indicators of compromise, or precise fixed builds beyond Zimbra advisory and release references.
Mitigation direction
- Identify all Zimbra Collaboration 8.8.15 and 9.0 deployments.
- Review Zimbra security advisories and P24 release guidance for vendor-approved fixes.
- Apply the relevant vendor-supported Zimbra update or mitigation.
- Reduce internet exposure where business operations allow.
- Monitor Zimbra and memcache-related logs for unusual cache or session behavior.
Validation and detection
- Confirm installed Zimbra versions and patch levels on every server.
- Compare each instance against Zimbra security advisory guidance.
- Check whether any exposed system matches the CVE description.
- Review recent logs for suspicious cache integrity or authentication anomalies.
- Track this CVE in KEV-driven remediation reporting.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-74: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-27924 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesCVE reference · x_refsource_MISC
- https://wiki.zimbra.com/wiki/Security_CenterCVE reference · x_refsource_MISC
- https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27924CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.