Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-41498

24
FAUCET Score

CVE-2021-41498 describes a buffer overflow vulnerability in the Server_jack_init function of Pyo versions prior to 1.03, affecting the pyo_project pyo library. This flaw allows unauthenticated attackers to trigger a Denial of Service (DoS) by supplying an excessively long server name. With a CVSS score of 7.5 (High), this vulnerability is network-exploitable with low attack complexity, requiring no user interaction or privileges, and its primary impact is system availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.03CPE matchmatch criteria
cpe:2.3:a:pyo_project:pyo:1.03:*:*:*:*:*:*:*

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
1.07%
Probability of exploitation in next 30 days
EPSS Percentile
61.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0107 is in the 38th 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

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: pyoFixed in: 1.0.4

Vendor Advisories (1)

pipGHSA-qj27-32wp-ghrghigh

Pyo Buffer Overflow Vulnerability

Dec 18, 2021

References

github.com / belangeo/pyo/issues/221
ExploitIssue TrackingThird Party Advisory