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CVE-2018-18659

24
FAUCET Score

CVE-2018-18659 describes an unauthenticated XML External Entity (XXE) vulnerability in Arcserve Unified Data Protection (UDP) through version 6.5 Update 4. This high-severity flaw, rated 7.5 on the CVSS scale, allows an unauthenticated attacker to achieve high confidentiality impact with low attack complexity over the network. While the vulnerability could lead to sensitive information disclosure, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:a:arcserve:udp:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:arcserve:udp:6.0:1:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:arcserve:udp:6.0:2:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:arcserve:udp:6.0:3:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:a:arcserve:udp:6.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.83%
Probability of exploitation in next 30 days
EPSS Percentile
76.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0183 is in the 60th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.arcserve.com / s/article/360001392563
PatchVendor Advisory
support.arcserve.com / s/article/Security-vulnerabilities-with-Arcserve-UDP-and-fixes-for-them
PatchVendor Advisory
digitaldefense.com / blog/zero-day-alerts/arcserve-disclosure
Third Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/152033
Third Party Advisory