How severe is CVE-2016-4868?

CVE-2016-4868 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2016-4868 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4868?

CVE-2016-4868 primarily affects Cybozu Office. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-4868?

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

When was CVE-2016-4868 published?

CVE-2016-4868 was published on 2017-04-17 and last updated on 2026-06-17.

CVE-2016-4868

CVE-2016-4868 is a medium-severity vulnerability in Cybozu Office with a CVSS 3.x base score of 4.3. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cybozu Office
Published: 2017-04-17
Last modified: 2026-06-17

Description

Email header injection vulnerability in Cybozu Office 9.0.0 to 10.4.0 allows remote attackers to inject arbitrary email headers to send unintended emails via specially crafted requests.

Frequently asked questions

What is CVE-2016-4868?: Email header injection vulnerability in Cybozu Office 9.0.0 to 10.4.0 allows remote attackers to inject arbitrary email headers to send unintended emails via specially crafted requests.
How severe is CVE-2016-4868?: CVE-2016-4868 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2016-4868 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4868?: CVE-2016-4868 primarily affects Cybozu Office. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-4868?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-4868 published?: CVE-2016-4868 was published on 2017-04-17 and last updated on 2026-06-17.

References

Affected products (16)

cpe:2.3:a:cybozu:office:9.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:9.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:9.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:9.2.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:9.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:9.3.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:9.3.2:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:9.9.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:10.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:10.0.1:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:10.0.2:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:10.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:10.1.2:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:10.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:10.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cybozu:office:10.4.0:*:*:*:*:*:*:*

More vulnerabilities in Cybozu Office

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-2016-1151 — High (CVSS 8.8): Multiple cross-site request forgery (CSRF) vulnerabilities in Cybozu Office 9.9.0 through 10.3.0 allow remote attackers…
CVE-2018-0704 — High (CVSS 7.5): Directory traversal vulnerability in Cybozu Office 10.0.0 to 10.8.1 allows remote attackers to delete arbitrary files…
CVE-2018-0703 — High (CVSS 7.5): Directory traversal vulnerability in Cybozu Office 10.0.0 to 10.8.1 allows remote attackers to delete arbitrary files…
CVE-2015-8483 — High (CVSS 7.4): Open redirect vulnerability in Cybozu Office 10.2.0 through 10.3.0 allows remote attackers to redirect users to…
CVE-2024-39817 — Medium (CVSS 6.5): Insertion of sensitive information into sent data issue exists in Cybozu Office 10.0.0 to 10.8.6, which may allow a…

All CVEs affecting Cybozu Office →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →