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CVE-2021-28847

24
FAUCET Score

CVE-2021-28847 describes a denial-of-service vulnerability in MobaXterm versions prior to 21.0, where a remote server can cause the Windows GUI to hang by rapidly sending tab title change requests. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited remotely with low complexity to achieve high availability impact. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), it has garnered some community discussion and media coverage, including an article from BleepingComputer.

Impacted Technologies

VendorProductVersion(s)CPE
< 21.0CPE matchmatch criteria
cpe:2.3:a:mobatek:mobaxterm:*:*:*:*:home:*:*:*

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
1.43%
Probability of exploitation in next 30 days
EPSS Percentile
70.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0143 is in the 51st 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

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

mobaxterm.mobatek.net / download-home-edition.html
ProductRelease NotesVendor Advisory
mobaxterm.mobatek.net / preview.html
Release NotesVendor Advisory