How severe is CVE-2019-5977?

CVE-2019-5977 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2019-5977 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-5977?

CVE-2019-5977 affects Cybozu Garoon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-5977?

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

When was CVE-2019-5977 published?

CVE-2019-5977 was published on 2019-09-12 and last updated on 2026-06-17.

CVE-2019-5977

CVE-2019-5977 is a medium-severity vulnerability in Cybozu Garoon 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-74.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Cybozu Garoon
Published: 2019-09-12
Last modified: 2026-06-17

Description

Mail header injection vulnerability in Cybozu Garoon 4.0.0 to 4.10.2 may allow a remote authenticated attackers to alter mail header via the application 'E-Mail'.

Frequently asked questions

What is CVE-2019-5977?: Mail header injection vulnerability in Cybozu Garoon 4.0.0 to 4.10.2 may allow a remote authenticated attackers to alter mail header via the application 'E-Mail'.
How severe is CVE-2019-5977?: CVE-2019-5977 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2019-5977 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-5977?: CVE-2019-5977 affects Cybozu Garoon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-5977?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-5977 published?: CVE-2019-5977 was published on 2019-09-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cybozu:garoon:*:*:*:*:*:*:*:*

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