# CVE-2022-27925 — Synacor Zimbra Collaboration Suite 8.8.15 **CISA KEV** · **Ransomware** > As of 2025-10-21, CVE-2022-27925 is a HIGH-severity vulnerability in Synacor Zimbra Collaboration Suite 8.8.15, CVSS v3.1 7.2, EPSS 98.1% (99.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-08-11), with a US federal remediation deadline of 2022-09-01, and CISA links it to known ransomware campaigns. Threadlinqs Intelligence links 4 tracked threat campaigns to CVE-2022-27925, most recently “Chinese-speaking threat group UAT-10147 uses agentic AI to automate exploitation of internet-facing web servers”. **Last updated:** 2025-10-21 ## What is CVE-2022-27925? Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. An authenticated user with administrator rights has the ability to upload arbitrary files to the system, leading to directory traversal. The record classifies CVE-2022-27925 under weakness class [CWE-22](https://cwe.mitre.org/data/definitions/22.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 30 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1607 days ago. ## Severity and exploitation probability - **CVSS v3.1 base score:** 7.2 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`) - **EPSS (FIRST):** 98.1% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs - **CISA KEV:** Listed since 2022-08-11, federal remediation deadline 2022-09-01 — used in known ransomware campaigns - **Threadlinqs priority:** 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum - **Published:** 2022-04-20, last modified 2025-10-21 ## Is CVE-2022-27925 being exploited? CISA added CVE-2022-27925 to the Known Exploited Vulnerabilities catalog on 2022-08-11, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2022-09-01 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2022-27925 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 43 in the Threadlinqs vulnerability feed. - [vnhacker1337/CVE-2022-27925-PoC](https://github.com/vnhacker1337/CVE-2022-27925-PoC) (github) - [Josexv1/CVE-2022-27925](https://github.com/Josexv1/CVE-2022-27925) (github) - [SystemVll/CVE-2022-27925](https://github.com/SystemVll/CVE-2022-27925) (github) - [jam620/Zimbra](https://github.com/jam620/Zimbra) (github) - [Chocapikk/CVE-2022-27925-Revshell](https://github.com/Chocapikk/CVE-2022-27925-Revshell) (github) - [akincibor/CVE-2022-27925](https://github.com/akincibor/CVE-2022-27925) (github) - [touchmycrazyredhat/CVE-2022-27925-Revshell](https://github.com/touchmycrazyredhat/CVE-2022-27925-Revshell) (github) - [huahuatzt/CVE-2022-27925](https://github.com/huahuatzt/CVE-2022-27925) (github) ## Affected products and versions - **Synacor**: Zimbra Collaboration Suite 8.8.15 _Showing 1 of 30 recorded product entries._ ## How to fix CVE-2022-27925 Vendor advisory: [https://wiki.zimbra.com/wiki/Security_Center](https://wiki.zimbra.com/wiki/Security_Center). Because CVE-2022-27925 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2022-09-01. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory. ## Threat activity tracking CVE-2022-27925 4 tracked threats in the Threadlinqs corpus reference CVE-2022-27925, either in the campaign’s CVE list or as an indicator on the campaign record. - [Chinese-speaking threat group UAT-10147 uses agentic AI to automate exploitation of internet-facing web servers](https://intel.threadlinqs.com/threat/TL-2026-2096) — HIGH · 2026-08-21 - [StrikeShark Campaign: SharkLoader Dropper Targets Governments and Software Developers via N-Day Exploits and Trojanized Installers to Deploy Cobalt Strike](https://intel.threadlinqs.com/threat/TL-2026-1237) — HIGH · 2026-07-11 - [SharkLoader Malware Campaign Uses Fake Cisco AnyConnect and Google Update Installers to Deploy Cobalt Strike](https://intel.threadlinqs.com/threat/TL-2026-1101) — HIGH · 2026-07-03 - [SharkLoader Malware Deploys Cobalt Strike Beacon via DLL Side-Loading in StrikeShark Campaign](https://intel.threadlinqs.com/threat/TL-2026-0961) — HIGH · 2026-06-27 ## Sources Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-06-28. This product uses the NVD API but is not endorsed or certified by the NVD. **Other references** - [wiki.zimbra.com](https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories) - [wiki.zimbra.com (Security Center)](https://wiki.zimbra.com/wiki/Security_Center) - [wiki.zimbra.com (P24)](https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24) - [packetstormsecurity.com](http://packetstormsecurity.com/files/168146/Zimbra-Zip-Path-Traversal.html) Canonical: https://intel.threadlinqs.com/cve/CVE-2022-27925 Full detection coverage and IOCs for threats exploiting CVE-2022-27925 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp