{"id":"CVE-2022-27924","kind":"vulnerability","aliases":["CVE-2022-27924"],"related":[],"title":"synacor zimbra collaboration suite: Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to inject arbitrary memcache…","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.","summary":"Zimbra Collaboration Suite lets an attacker inject memcache commands into a running instance, overwriting arbitrary cached entries. CISA lists it as actively exploited, and ransomware use is tagged in the source data.","severity":"critical","cvss":9.8,"epss":0.93908,"exploited":true,"exploited_at":"2022-08-04T00:00:00+00:00","products":[{"name":"Synacor Zimbra Collaboration Suite (ZCS)","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"synacor zimbra collaboration suite","fixed":[],"affected":"= 8.8.15","ecosystem":"vendor"},{"name":"synacor zimbra collaboration suite","fixed":[],"affected":"= 9.0.0","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["email","exploited","package","ransomware","self-hosted","zimbra"],"not_affected_if":["managed-hosting"],"how_to_check":null,"fix":"Apply the Zimbra updates per vendor instructions; the specific fixed version is not stated in the sources.","status":"open","published_at":"2022-04-21T00:15:08+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:11:03+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-10-23T21:11:03Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Zimbra updates per vendor instructions; the specific fixed version is not stated in the sources.","reach":"internet","impact":"high","summary":"Zimbra Collaboration Suite lets an attacker inject memcache commands into a running instance, overwriting arbitrary cached entries. CISA lists it as actively exploited, and ransomware use is tagged in the source data.","category":"package","who_cares":["zimbra","self-hosted","email"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker overwrites cached session data, possibly enabling account takeover and further compromise","analyst_note":"Find the fixed Zimbra version and the vendor advisory, plus a way to check for memcache injection indicators, at the CISA KEV entry or Synacor's Zimbra security advisory.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00047,"input_tokens":2887,"output_tokens":362,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':21A,24A '-27924':22A,25A '8.8.15':9A,83C '9.0':11A,85C 'activ':68B 'aka':7A,81C 'allow':12A,86C 'arbitrari':18A,61B,92C,108C 'attack':15A,52B,89C 'becom':102C 'cach':62B,109C 'caus':104C 'cisa':64B 'collabor':3A,6A,48B,80C 'collaboration':28A,33A,37A 'command':55B,94C,101C 'cve':20A,23A 'data':78B 'email':39B 'entri':63B,110C 'exploit':40B,69B 'host':45B 'inject':17A,53B,91C 'instanc':59B,98C 'let':50B 'list':65B 'memcach':19A,54B,93C,100C 'overwrit':60B,106C 'packag':41B 'ransomwar':42B,71B 'run':58B 'self':44B 'self-host':43B 'sourc':77B 'suit':4A,49B 'suite':29A,34A,38A 'synacor':1A,26A,31A,35A 'tag':74B 'target':97C 'unauthent':14A,88C 'unescap':103C 'use':72B 'zcs':8A,30A,82C 'zimbra':2A,5A,27A,32A,36A,46B,47B,79C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-04-21T00:15:08+00:00","kev":{"dateAdded":"2022-08-04","dueDate":"2022-08-25","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-27924","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-27924","severity":null,"published_at":"2022-08-04T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:06+00:00","note":null},{"source":"epss","external_id":"CVE-2022-27924","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-27924","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2022-27924","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-27924","severity":null,"published_at":"2022-04-21T00:15:08+00:00","modified_at":"2026-10-02T14:55:01+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}