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CVE-2016-2055

40
FAUCET Score

CVE-2016-2055 describes a critical arbitrary file read vulnerability in Xymon versions 4.1.x, 4.2.x, and 4.3.x before 4.3.25, specifically within the xymond component. This flaw allows unauthenticated remote attackers to access and read any file within the configuration directory by sending a crafted "config" command. Rated with a CVSSv3 score of 7.5 (HIGH), this vulnerability has a low attack complexity and requires no user interaction or privileges, enabling a high impact on confidentiality. The EPSS score of 0.67997 indicates a higher than average probability of exploitation. While there is no evidence of active exploitation in the wild, a Metasploit auxiliary module exists, demonstrating exploitability. Despite this, the vulnerability has garnered minimal community discussion and media coverage, suggesting it is not widely known or actively targeted.

Impacted Technologies

VendorProductVersion(s)CPE
4.1.0CPE matchmatch criteria
cpe:2.3:a:xymon:xymon:4.1.0:*:*:*:*:*:*:*
4.1.1CPE matchmatch criteria
cpe:2.3:a:xymon:xymon:4.1.1:*:*:*:*:*:*:*
4.1.2CPE matchmatch criteria
cpe:2.3:a:xymon:xymon:4.1.2:*:*:*:*:*:*:*
4.1.2CPE matchmatch criteria
cpe:2.3:a:xymon:xymon:4.1.2:p1:*:*:*:*:*:*
4.1.2CPE matchmatch criteria
cpe:2.3:a:xymon:xymon:4.1.2:p2:*:*:*:*:*:*

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
17.85%
Probability of exploitation in next 30 days
EPSS Percentile
96.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.1785 is in the 95th percentile among its peer group of 51,466 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

packetstormsecurity.com / files/135758/Xymon-4.3.x-Buffer-Overflow-Code-Execution-Information-Disclosure.html
sourceforge.net / p/xymon/code/7890
Patch
debian.org / security/2016/dsa-3495
securityfocus.com / archive/1/537522/100/0/threaded