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CVE-2021-25946

30
FAUCET Score

CVE-2021-25946 is a critical prototype pollution vulnerability affecting nconf-toml versions 0.0.1 through 0.0.2, allowing unauthenticated attackers to potentially cause denial of service or achieve remote code execution. With a CVSS score of 9.8, it presents a severe risk due to its network-based attack vector and low complexity. Despite its high severity, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.0.1, <= 0.0.2CPE matchmatch criteria
cpe:2.3:a:nconf-toml_project:nconf-toml:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.30%
Probability of exploitation in next 30 days
EPSS Percentile
87.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0330 is in the 79th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-hx7j-43w2-7rj7critical

Prototype pollution in nconf-toml

Jun 7, 2021

References

github.com / RobLoach/nconf-toml/blob/8ade08cd1cfb9691ab7cc5c3514cc05c5085918f/index.js
ExploitThird Party Advisory
whitesourcesoftware.com / vulnerability-database/CVE-2021-25946
ExploitThird Party Advisory