Threats / Synacor / CVE-2022-27925
CVE-2022-27925
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Synacor Zimbra Collaboration Suite (ZCS) vulnerability
Zimbra Collaboration Suite contains a path traversal flaw in mboximport functionality allowing authenticated attackers to upload arbitrary files and execute code. When chained with CVE-2022-37042, unauthenticated remote code execution is po
Verdict
Today item, not a backlog item.
This vulnerability enables remote code execution through file upload abuse in a widely-deployed email collaboration platform. Active exploitation in ransomware campaigns and high EPSS score indicate immediate threat to organizations running affected ZCS versions.
CISA KEV Yes · 2022-08-114Ransomware use Flagged4EPSS 0.98586 (verify live)5Exploit Weaponized · public PoC6CVSS 7.2 (CISA)3CISA SSVC Exploitation: active · Automatable: yes · Impact: total3
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
37 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-08-11), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.98586 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 7.2 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H) · Affected: Synacor, Zimbra Collaboration Suite (ZCS). Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-22 Path Traversal — weakness family: Path traversal / file.CWE assignment from the public NVD record (may be stale); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 113 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
Public exploit available
Public exploit tooling is catalogued for this CVE (a functional/weaponized public exploit). Catalog entries: Metasploit module. We link the catalog page(s) only — no payload or code is hosted or restated here.Link, never host — the catalog page is the source; basicsecurity.net does not redistribute payloads.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I exploit CVE-2022-37042 to gain initial unauthenticated access to the Zimbra server.
Business
Attackers bypass authentication controls, eliminating the first security perimeter.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I leverage the mboximport path traversal flaw to upload malicious files outside intended directories.
Business
Arbitrary file placement compromises filesystem integrity and application isolation.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute uploaded files to achieve remote code execution with Zimbra service privileges.
Business
Attackers gain full control of email infrastructure and access to organizational communications.
4
Data at risk — exfiltration narrative 4
Attacker
I establish persistence and move laterally through the network using compromised credentials and data.
Business
Ransomware operators encrypt critical systems and exfiltrate sensitive business data for extortion.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05