CVE-2026-73573

Q: How do I fix CVE-2026-73573?

Upgrade zimbra collaboration suite to 10.1.17 or later.

Q: Is CVE-2026-73573 being actively exploited?

Not that we know of. CVE-2026-73573 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.30% is the estimated probability that it will be exploited in the next 30 days. That is higher than 22% of all scored CVEs.

Q: How severe is CVE-2026-73573?

CVE-2026-73573 has a CVSS v3 base score of 3.1, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-73573 affect?

Published advisories record a fix for zimbra collaboration suite (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

LOW

3.1

CVSS v3

NVD

Description

In Zimbra Collaboration (ZCS) before 10.1.17, a path traversal vulnerability exists in the Zimbra Briefcase document editing functionality due to improper validation of the packages parameter. An authenticated attacker can exploit this vulnerability by supplying a crafted path traversal sequence, potentially allowing unauthorized disclosure of sensitive files within the web application directory.

CWE-24

How to fix

Remediation Available

zimbra collaboration suiteNVD

Affected:< 10.1.17Fixed in:10.1.17CVE-2026-73573derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.30%probability of exploitation in 30 days

22ndpercentile

Low risk: more likely to be exploited than 22% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-24 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2026-39813	Critical	9.8	23%	-	Fix
CVE-2022-38129	Critical	9.8	19%	-	-
CVE-2025-60344	High	8.6	10%	-	-
CVE-2021-33036	High	8.8	3.8%	-	Fix
CVE-2023-1800	High	7.3	3.5%	-	-
CVE-2024-6746	Medium	4.3	3.3%	-	-

Common questions

How do I fix CVE-2026-73573?

Upgrade zimbra collaboration suite to 10.1.17 or later.

Is CVE-2026-73573 being actively exploited?

Not that we know of. CVE-2026-73573 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.30% is the estimated probability that it will be exploited in the next 30 days. That is higher than 22% of all scored CVEs.

How severe is CVE-2026-73573?

CVE-2026-73573 has a CVSS v3 base score of 3.1, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-73573 affect?

Published advisories record a fix for zimbra collaboration suite (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-28.