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CVE-2021-42860

24
FAUCET Score

CVE-2021-42860 describes a stack buffer overflow vulnerability in Mini-XML v3.2, specifically affecting the mxmlLoadString API when processing malformed XML strings. This high-severity vulnerability (CVSS 7.5) can be exploited remotely without user interaction, leading to a denial of service. While no public exploits or active exploitation have been observed, and community discussion is minimal, the potential for a complete system compromise remains a concern.

Impacted Technologies

VendorProductVersion(s)CPE
3.2CPE matchmatch criteria
cpe:2.3:a:mini-xml_project:mini-xml:3.2:*:*:*:*:*:*:*

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
0.99%
Probability of exploitation in next 30 days
EPSS Percentile
58.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0099 is in the 34th percentile among its peer group of 51,485 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

github.com / michaelrsweet/mxml/issues/286
ExploitIssue TrackingThird Party Advisory