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CVE-2021-42095

24
FAUCET Score

CVE-2021-42095 describes a denial-of-service vulnerability affecting Xshell versions prior to 7.0.0.76, where rapid changes to the title bar can cause the application to crash. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low attack complexity, leading to a high impact on availability. While no active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB) has been identified, there is some community discussion and media coverage, suggesting awareness of the issue.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.0.0.76CPE matchmatch criteria
cpe:2.3:a:netsarang:xshell:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.93%
Probability of exploitation in next 30 days
EPSS Percentile
56.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0093 is in the 32nd percentile among its peer group of 51,551 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

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

netsarang.com / en/xshell-update-history
Release NotesVendor Advisory