Is It On KEV?

Synacor Zimbra Collaboration Suite (ZCS)

YES - ON THE CISA KEV LIST
CVE-2019-9670

Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference

CISA catalog due date2022-07-10
overdue since 2022-07-10
EPSS exploit probability (next 30 days)100.0% · 100percentile
From CVE publication to KEV listing957 days (2019-05-29 → 2022-01-10)
Remediation window (KEV listing to due date)181 days
Days on the KEV list1766 days
Date added to KEV2022-01-10
Known ransomware campaign useUnknown
VendorSynacor
ProductZimbra Collaboration Suite (ZCS)
Weaknesses (CWE)CWE-611

Synacor: 19 entries (1.1% of all KEV entries are from this vendor); 5 added in 2026.

BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.

Your BOD 26-04 window (SSVC tier helper)

Your remediation window ends:

Description

Synacor Zimbra Collaboration Suite (ZCS) contains an improper restriction of XML external entity (XXE) vulnerability in the mailboxd component.

Required action (CISA)

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2019-9670

References

Other KEV entries for this vendor: Synacor

Synacor - Vendors with KEV entries

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