How severe is CVE-2018-18659?

CVE-2018-18659 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-18659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18659?

CVE-2018-18659 primarily affects Arcserve Udp. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-18659?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-18659 published?

CVE-2018-18659 was published on 2018-10-26 and last updated on 2026-06-17.

CVE-2018-18659

CVE-2018-18659 is a high-severity vulnerability in Arcserve Udp with a CVSS 3.x base score of 7.5. 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-611.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Arcserve Udp
Published: 2018-10-26
Last modified: 2026-06-17

Description

An issue was discovered in Arcserve Unified Data Protection (UDP) through 6.5 Update 4. There is a DDI-VRT-2018-19 Unauthenticated XXE in /management/UdpHttpService issue.

Frequently asked questions

What is CVE-2018-18659?: An issue was discovered in Arcserve Unified Data Protection (UDP) through 6.5 Update 4. There is a DDI-VRT-2018-19 Unauthenticated XXE in /management/UdpHttpService issue.
How severe is CVE-2018-18659?: CVE-2018-18659 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-18659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18659?: CVE-2018-18659 primarily affects Arcserve Udp. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-18659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-18659 published?: CVE-2018-18659 was published on 2018-10-26 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:a:arcserve:udp:6.0:*:*:*:*:*:*:*
cpe:2.3:a:arcserve:udp:6.0:1:*:*:*:*:*:*
cpe:2.3:a:arcserve:udp:6.0:2:*:*:*:*:*:*
cpe:2.3:a:arcserve:udp:6.0:3:*:*:*:*:*:*
cpe:2.3:a:arcserve:udp:6.5:*:*:*:*:*:*:*
cpe:2.3:a:arcserve:udp:6.5:1:*:*:*:*:*:*
cpe:2.3:a:arcserve:udp:6.5:2:*:*:*:*:*:*
cpe:2.3:a:arcserve:udp:6.5:3:*:*:*:*:*:*
cpe:2.3:a:arcserve:udp:6.5:4:*:*:*:*:*:*

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