Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to…
Priority CRITICAL 100Exploited in the wildCWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation Active In CISA KEV since 2022-08-04CISA due date 2022-08-25Known ransomware use
EPSS 0.93908 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 56
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:-:*:*:*:*:*:* | 8.8.15 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p1:*:*:*:*:*:* | 8.8.15 p1 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p10:*:*:*:*:*:* | 8.8.15 p10 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p11:*:*:*:*:*:* | 8.8.15 p11 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p12:*:*:*:*:*:* | 8.8.15 p12 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p13:*:*:*:*:*:* | 8.8.15 p13 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p14:*:*:*:*:*:* | 8.8.15 p14 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p15:*:*:*:*:*:* | 8.8.15 p15 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p16:*:*:*:*:*:* | 8.8.15 p16 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p17:*:*:*:*:*:* | 8.8.15 p17 | Vulnerable | Synacor |
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:-:*:*:*:*:*:* Versions 8.8.15 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p1:*:*:*:*:*:* Versions 8.8.15 p1 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p10:*:*:*:*:*:* Versions 8.8.15 p10 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p11:*:*:*:*:*:* Versions 8.8.15 p11 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p12:*:*:*:*:*:* Versions 8.8.15 p12 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p13:*:*:*:*:*:* Versions 8.8.15 p13 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p14:*:*:*:*:*:* Versions 8.8.15 p14 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p15:*:*:*:*:*:* Versions 8.8.15 p15 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p16:*:*:*:*:*:* Versions 8.8.15 p16 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p17:*:*:*:*:*:* Versions 8.8.15 p17 Vulnerable ·Synacor
Show 46 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p18:*:*:*:*:*:* | 8.8.15 p18 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p19:*:*:*:*:*:* | 8.8.15 p19 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p2:*:*:*:*:*:* | 8.8.15 p2 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p20:*:*:*:*:*:* | 8.8.15 p20 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p21:*:*:*:*:*:* | 8.8.15 p21 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p22:*:*:*:*:*:* | 8.8.15 p22 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p23:*:*:*:*:*:* | 8.8.15 p23 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p24:*:*:*:*:*:* | 8.8.15 p24 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p25:*:*:*:*:*:* | 8.8.15 p25 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p26:*:*:*:*:*:* | 8.8.15 p26 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p27:*:*:*:*:*:* | 8.8.15 p27 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p28:*:*:*:*:*:* | 8.8.15 p28 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p29:*:*:*:*:*:* | 8.8.15 p29 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p3:*:*:*:*:*:* | 8.8.15 p3 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p30:*:*:*:*:*:* | 8.8.15 p30 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p31:*:*:*:*:*:* | 8.8.15 p31 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p4:*:*:*:*:*:* | 8.8.15 p4 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p5:*:*:*:*:*:* | 8.8.15 p5 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p6:*:*:*:*:*:* | 8.8.15 p6 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p7:*:*:*:*:*:* | 8.8.15 p7 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p8:*:*:*:*:*:* | 8.8.15 p8 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p9:*:*:*:*:*:* | 8.8.15 p9 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:-:*:*:*:*:*:* | 9.0.0 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p1:*:*:*:*:*:* | 9.0.0 p1 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p10:*:*:*:*:*:* | 9.0.0 p10 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p11:*:*:*:*:*:* | 9.0.0 p11 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p12:*:*:*:*:*:* | 9.0.0 p12 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p13:*:*:*:*:*:* | 9.0.0 p13 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p14:*:*:*:*:*:* | 9.0.0 p14 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p15:*:*:*:*:*:* | 9.0.0 p15 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p16:*:*:*:*:*:* | 9.0.0 p16 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p17:*:*:*:*:*:* | 9.0.0 p17 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p18:*:*:*:*:*:* | 9.0.0 p18 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p19:*:*:*:*:*:* | 9.0.0 p19 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p2:*:*:*:*:*:* | 9.0.0 p2 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p20:*:*:*:*:*:* | 9.0.0 p20 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p21:*:*:*:*:*:* | 9.0.0 p21 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p22:*:*:*:*:*:* | 9.0.0 p22 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p23:*:*:*:*:*:* | 9.0.0 p23 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p3:*:*:*:*:*:* | 9.0.0 p3 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p4:*:*:*:*:*:* | 9.0.0 p4 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p5:*:*:*:*:*:* | 9.0.0 p5 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p6:*:*:*:*:*:* | 9.0.0 p6 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p7:*:*:*:*:*:* | 9.0.0 p7 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p8:*:*:*:*:*:* | 9.0.0 p8 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p9:*:*:*:*:*:* | 9.0.0 p9 | Vulnerable | Synacor |
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p18:*:*:*:*:*:* Versions 8.8.15 p18 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p19:*:*:*:*:*:* Versions 8.8.15 p19 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p2:*:*:*:*:*:* Versions 8.8.15 p2 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p20:*:*:*:*:*:* Versions 8.8.15 p20 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p21:*:*:*:*:*:* Versions 8.8.15 p21 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p22:*:*:*:*:*:* Versions 8.8.15 p22 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p23:*:*:*:*:*:* Versions 8.8.15 p23 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p24:*:*:*:*:*:* Versions 8.8.15 p24 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p25:*:*:*:*:*:* Versions 8.8.15 p25 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p26:*:*:*:*:*:* Versions 8.8.15 p26 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p27:*:*:*:*:*:* Versions 8.8.15 p27 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p28:*:*:*:*:*:* Versions 8.8.15 p28 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p29:*:*:*:*:*:* Versions 8.8.15 p29 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p3:*:*:*:*:*:* Versions 8.8.15 p3 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p30:*:*:*:*:*:* Versions 8.8.15 p30 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p31:*:*:*:*:*:* Versions 8.8.15 p31 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p4:*:*:*:*:*:* Versions 8.8.15 p4 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p5:*:*:*:*:*:* Versions 8.8.15 p5 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p6:*:*:*:*:*:* Versions 8.8.15 p6 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p7:*:*:*:*:*:* Versions 8.8.15 p7 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p8:*:*:*:*:*:* Versions 8.8.15 p8 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p9:*:*:*:*:*:* Versions 8.8.15 p9 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:-:*:*:*:*:*:* Versions 9.0.0 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p1:*:*:*:*:*:* Versions 9.0.0 p1 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p10:*:*:*:*:*:* Versions 9.0.0 p10 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p11:*:*:*:*:*:* Versions 9.0.0 p11 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p12:*:*:*:*:*:* Versions 9.0.0 p12 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p13:*:*:*:*:*:* Versions 9.0.0 p13 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p14:*:*:*:*:*:* Versions 9.0.0 p14 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p15:*:*:*:*:*:* Versions 9.0.0 p15 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p16:*:*:*:*:*:* Versions 9.0.0 p16 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p17:*:*:*:*:*:* Versions 9.0.0 p17 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p18:*:*:*:*:*:* Versions 9.0.0 p18 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p19:*:*:*:*:*:* Versions 9.0.0 p19 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p2:*:*:*:*:*:* Versions 9.0.0 p2 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p20:*:*:*:*:*:* Versions 9.0.0 p20 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p21:*:*:*:*:*:* Versions 9.0.0 p21 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p22:*:*:*:*:*:* Versions 9.0.0 p22 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p23:*:*:*:*:*:* Versions 9.0.0 p23 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p3:*:*:*:*:*:* Versions 9.0.0 p3 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p4:*:*:*:*:*:* Versions 9.0.0 p4 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p5:*:*:*:*:*:* Versions 9.0.0 p5 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p6:*:*:*:*:*:* Versions 9.0.0 p6 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p7:*:*:*:*:*:* Versions 9.0.0 p7 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p8:*:*:*:*:*:* Versions 9.0.0 p8 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0:p9:*:*:*:*:*:* Versions 9.0.0 p9 Vulnerable ·Synacor
Remediation
No fixed version listed by the sources yet.
Timeline
- 2022-08-04 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2022-27924
- 2026-10-03 Alias added: GHSA-763p-5rx7-r4qf
References
More Synacor Zimbra Collaboration Suite vulnerabilities
- TI-2024-30554 The postjournal service in Zimbra Collaboration (ZCS) before 8.8.15 Patch 46, 9 before… KEVCVSS 3.1CRITICAL 10.0
- TI-2022-19841 An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. KEVCVSS 3.1CRITICAL 9.8
- TI-2022-17239 Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0 has mboximport functionality that… KEVCVSS 3.1CRITICAL 9.8
- TI-2020-06312 Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is… KEVCVSS 3.1CRITICAL 9.8
- TI-2019-07076 mailboxd component in Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10 has an… KEVCVSS 3.1CRITICAL 9.8
- TI-2026-51660 OS command injection in Zimbra Collaboration KEVCVSS 3.1HIGH 8.9
Sources
- CVE-2022-27924 · CVE Program
- CVE-2022-27924 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-763p-5rx7-r4qf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences