How severe is CVE-2016-4843?

CVE-2016-4843 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2016-4843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4843?

CVE-2016-4843 primarily affects Cybozu Mailwise. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-4843?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-4843 published?

CVE-2016-4843 was published on 2017-04-20 and last updated on 2026-06-17.

CVE-2016-4843

CVE-2016-4843 is a medium-severity vulnerability in Cybozu Mailwise with a CVSS 3.x base score of 6.5. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Cybozu Mailwise
Published: 2017-04-20
Last modified: 2026-06-17

Description

Cybozu Mailwise before 5.4.0 allows remote attackers to obtain sensitive cookie information.

Frequently asked questions

What is CVE-2016-4843?: Cybozu Mailwise before 5.4.0 allows remote attackers to obtain sensitive cookie information.
How severe is CVE-2016-4843?: CVE-2016-4843 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2016-4843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4843?: CVE-2016-4843 primarily affects Cybozu Mailwise. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-4843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-4843 published?: CVE-2016-4843 was published on 2017-04-20 and last updated on 2026-06-17.

References

Affected products (14)

cpe:2.3:a:cybozu:mailwise:5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.0.4:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.0.5:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.0.6:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.1.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.1.2:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.1.4:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.2.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.3.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:mailwise:5.3.2:*:*:*:*:*:*:*

More vulnerabilities in Cybozu Mailwise

CVE-2014-5314 — Critical (CVSS 9.0): Buffer overflow in Cybozu Office 9 and 10 before 10.1.0, Mailwise 4 and 5 before 5.1.4, and Dezie 8 before 8.1.1 allows…
CVE-2018-0702 — High (CVSS 7.5): Directory traversal vulnerability in Cybozu Mailwise 5.0.0 to 5.4.5 allows remote attackers to delete arbitrary files…
CVE-2013-2305 — Medium (CVSS 6.8): Cross-site request forgery (CSRF) vulnerability in Cybozu Office before 8.1.6 and 9.x before 9.3.0, Cybozu Dezie before…
CVE-2018-0559 — Medium (CVSS 6.1): Cross-site scripting vulnerability in Cybozu Mailwise 5.0.0 to 5.4.1 allows remote attackers to inject arbitrary web…
CVE-2018-0558 — Medium (CVSS 6.1): Reflected cross-site scripting vulnerability in Cybozu Mailwise 5.0.0 to 5.4.1 allows remote attackers to inject…
CVE-2018-0557 — Medium (CVSS 6.1): Stored cross-site scripting vulnerability in Cybozu Mailwise 5.0.0 to 5.4.1 allows remote attackers to inject arbitrary…

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