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CVE-2022-41352

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload arbitrary files through amavis via a cpio loophole (extraction to /opt/zimbra/jetty/webapps/zimbra/public) that can lead to incorrect access to any other user accounts. Zimbra recommends …

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An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload arbitrary files through amavis via a cpio loophole (extraction to /opt/zimbra/jetty/webapps/zimbra/public) that can lead to incorrect access to any other user accounts. Zimbra recommends pax over cpio. Also, pax is in the prerequisites of Zimbra on Ubuntu; however, pax is no longer part of a default Red Hat installation after RHEL 6 (or CentOS 6). Once pax is installed, amavis automatically prefers it over cpio.
CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.9/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 95.48%: +0.48

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 11 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

GreyNoise
Press · 26 Feb 2025, 08:00 · GreyNoise Detects Active Exploitation of CVEs Mentioned in Black Basta’s Leaked Chat Logs - GreyNoise
Help Net Security
Press · 13 Feb 2025, 08:00 · Sandworm APT’s initial access subgroup hits organizations accross the globe - Help Net Security
The Hacker News
Press · 12 Feb 2025, 08:00 · Microsoft Uncovers Sandworm Subgroup's Global Cyber Attacks Spanning 15+ Countries - The Hacker News
Rapid7
Press · 21 Oct 2022, 07:00 · Metasploit Weekly Wrap-Up: 10/21/22 - Rapid7
The Hacker News
Press · 17 Oct 2022, 07:00 · Zimbra Releases Patch for Actively Exploited Vulnerability in its Collaboration Suite - The Hacker News
See all 11 source documents
BleepingComputer
Press · 15 Oct 2022, 07:00 · Almost 900 servers hacked using Zimbra zero-day flaw - BleepingComputer
Securelist
Press · 13 Oct 2022, 07:00 · Ongoing exploitation of CVE-2022-41352 (Zimbra 0-day) - Securelist
Kaspersky
Press · 13 Oct 2022, 07:00 · CVE-2022-41352 — vulnerability in Zimbra - Kaspersky
Flashpoint.io
Press · 07 Oct 2022, 07:00 · What We Know About the Zero-Day Vulnerability Affecting Zimbra Collaboration and cpio - Flashpoint.io
BleepingComputer
Press · 07 Oct 2022, 07:00 · Hackers exploiting unpatched RCE bug in Zimbra Collaboration Suite - BleepingComputer
Rapid7
Press · 06 Oct 2022, 07:00 · Unpatched Zero-Day RCE Vulnerability in Zimbra Collaboration Suite - Rapid7

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.9 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

2

Public exploit entries / repo candidates

See 2 repos with metrics
RepositoryStarsForksLanguageUpdated
segfault-it/cve-2022-4135281Python10 Oct 2022, 13:12
rxerium/CVE-2022-4135220—14 Oct 2025, 06:45
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 95.5%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:43.617123+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
26 Sep 2022, 00:00
First press mention
06 Oct 2022, 07:00
Added to the CISA KEV catalog
20 Oct 2022, 00:00
Latest press mention
26 Feb 2025, 08:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
2 repositories