CVE-2014-8563

CVE-2014-8563 is a critical-severity vulnerability in Synacor Zimbra Collaboration Server with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Description

Synacor Zimbra Collaboration before 8.0.9 allows plaintext command injection during STARTTLS.

Frequently asked questions

What is CVE-2014-8563?
Synacor Zimbra Collaboration before 8.0.9 allows plaintext command injection during STARTTLS.
How severe is CVE-2014-8563?
CVE-2014-8563 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2014-8563 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-8563?
CVE-2014-8563 affects Synacor Zimbra Collaboration Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2014-8563?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2014-8563 published?
CVE-2014-8563 was published on 2020-01-27 and last updated on 2026-06-17.

References

Affected products (1)

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