CVE-2022-27924 (GCVE-0-2022-27924)
Vulnerability from cvelistv5 – Published: 2022-04-20 23:23 – Updated: 2026-08-04 03:55Summary
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.
Severity
7.5 (High)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2022-08-08 00:00 UTC
CWE
- n/a
- CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | x_refsource_MISC |
| https://wiki.zimbra.com/wiki/Security_Center | x_refsource_MISC |
| https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24 | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: a8fa86ae-0a86-4042-ab18-30e842bf7299
Exploited: Yes
Timestamps
First Seen: 2022-08-04
Asserted: 2022-08-04
Scope
Notes: KEV entry: Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability | Affected: Synacor / Zimbra Collaboration Suite (ZCS) | Description: Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to inject memcache commands into a targeted instance which causes an overwrite of arbitrary cached entries. | Required action: Apply updates per vendor instructions. | Due date: 2022-08-25 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24.1#Security_Fixes; https://nvd.nist.gov/vuln/detail/CVE-2022-27924
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-93 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Zimbra Collaboration Suite (ZCS) |
| Due Date | 2022-08-25 |
| Date Added | 2022-08-04 |
| Vendorproject | Synacor |
| Vulnerabilityname | Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability |
| Knownransomwarecampaignuse | Known |
References
Created: 2026-02-02 13:25 UTC
| Updated: 2026-02-06 07:53 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5adaffe0-fd57-4578-8c35-6737ac489195
Exploited: Yes
Timestamps
First Seen: 2022-08-04
Asserted: 2022-08-04
Scope
Notes: KEVIntel entry: Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to inject arbitrary memcache commands into a targeted instance.... | Affected: Zimbra / Zimbra Collaboration | CVSS: 7.5 (HIGH) | Used in malware: yes | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Confirmed Compromise
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to inject arbitrary memcache commands into a targeted instance.... |
| Vendor | Zimbra |
| Product | Zimbra Collaboration |
| Added Date | 2022-08-04T00:00:00.000Z |
| Cvss Score | 7.5 |
| Epss Score | None |
| Cvss Severity | HIGH |
| Epss Percentile | None |
| Used In Malware | yes |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 11:13 UTC
| Updated: 2026-06-23 11:13 UTC
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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