CVE-2026-73573

LOW 3.1 ALL-YEARS

Published 2026-08-13 · Last modified 2026-08-13 · mitre · NVD: Analyzed

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.

LIMITED SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 39th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

3.1CVSS 3.1 · LOW · CNA

ConfidentialityLow
IntegrityNone
AvailabilityNone

What an attacker needs

✓Access: Reachable over the network — no local access needed
⚠Privileges: Requires a low-privilege account
✓User interaction: No user interaction needed
⚠Complexity: Needs a race window or specific setup

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Zimbra Synacor

Products Collaboration Zimbra Collaboration Suite

Weakness (CWE)

CWE-24: Path Traversal: '../filedir'

CVSS vector

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

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Synacor	Zimbra Collaboration Suite	< 10.1.17

All CVSS metrics

LOW 3.1 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
LOW 3.1 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
MEDIUM 6.5 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Advisories

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories Vendor AdvisoryCVE record · mitre · Updated 2026-08-13T15:22:21.561Z
NVD · CVE-2026-73573 · Updated 2026-08-28T13:54:52.883
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy Vendor AdvisoryCVE record · mitre · Updated 2026-08-13T15:22:21.561Z
NVD · CVE-2026-73573 · Updated 2026-08-28T13:54:52.883
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-58072 ADVISORYEUVD · EUVD-2026-58072

Sources: NVD · CVE.org · All sources and attribution · EPSS