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Critical· 9.8actively exploitedofficial fix available

CVE-2022-37042

Zimbra Collaboration Suite 8.8.15 allows attackers to upload ZIP archives without authentication, enabling directory traversal and remote code execution due to an incomplete fix for CVE-2022-27925. This critical vulnerability (CVSS 9.8) can be exploited to gain unauthorized access and execute arbitrary code.

publishedAug 12, 2022
last modifiedAug 4, 2026
sourcesNVD · CISA-KEV
severity · cvss
9.8
critical · how bad it is
exploitation · epss
89%
100th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 3, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Zimbra Collaboration Suite 8.8.15

02

Real-world impact

Attackers can upload malicious files via ZIP archives, bypassing authentication to execute code or access sensitive data.

03

Why this severity

CVSS 9.8 (critical): High confidence in exploitation leading to full system compromise.

04

What to do about it

official fix available
recommended steps
  1. 01Apply the vendor's security update for Zimbra Collaboration Suite 8.8.15 as instructed by CISA.
  2. 02Verify the update is installed and functioning correctly.

CISA KEV required action

05

Timeline

  1. Aug 11, 2022 · Aug 11, 2022
    Confirmed exploited (CISA KEV)
    CISA added it to the Known Exploited Vulnerabilities catalog — attackers are using it in the wild.
  2. Aug 12, 2022 · Aug 12, 2022
    Published
    Disclosed and added to the National Vulnerability Database.
  3. Sep 1, 2022 · Sep 1, 2022
    CISA remediation deadline
    Federal agencies are required to remediate by this date.
  4. Aug 4, 2026 · 2d ago
    Advisory updated
    The NVD record was last revised.
  5. Aug 4, 2026 · 2d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗CISA KEV catalog ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
CVE-2022-37042: Zimbra Collaboration Suite 8.8.15 allows attackers to upload ZIP archi · Vulnary