How severe is CVE-2018-8604?

CVE-2018-8604 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-2018-8604 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-2018-8604?

CVE-2018-8604 primarily affects Microsoft Exchange Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-8604?

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

When was CVE-2018-8604 published?

CVE-2018-8604 was published on 2018-12-12 and last updated on 2026-06-17.

CVE-2018-8604

CVE-2018-8604 is a medium-severity vulnerability in Microsoft Exchange Server 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.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Exchange Server
Published: 2018-12-12
Last modified: 2026-06-17

Description

A tampering vulnerability exists when Microsoft Exchange Server fails to properly handle profile data, aka "Microsoft Exchange Server Tampering Vulnerability." This affects Microsoft Exchange Server.

Frequently asked questions

What is CVE-2018-8604?: A tampering vulnerability exists when Microsoft Exchange Server fails to properly handle profile data, aka "Microsoft Exchange Server Tampering Vulnerability." This affects Microsoft Exchange Server.
How severe is CVE-2018-8604?: CVE-2018-8604 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-2018-8604 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-2018-8604?: CVE-2018-8604 primarily affects Microsoft Exchange Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-8604?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-8604 published?: CVE-2018-8604 was published on 2018-12-12 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_11:*:*:*:*:*:*

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