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-2021-43045

26
FAUCET Score

CVE-2021-43045 is a denial-of-service vulnerability in the .NET SDK of Apache Avro, affecting versions 1.10.2 and prior. An unauthenticated attacker can exploit this by causing excessive resource allocation, leading to service disruption. With a CVSS score of 7.5 (High), it has a low attack complexity and does not require user interaction. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.11.0CPE matchmatch criteria
cpe:2.3:a:apache:avro:*:*:*:*:*:.net:*:*

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
2.96%
Probability of exploitation in next 30 days
EPSS Percentile
85.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0296 is in the 75th percentile among its peer group of 51,553 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)

nugetpatch availablevia ghsa
Product: Apache.AvroFixed in: 1.11.0

Vendor Advisories (2)

nugetGHSA-868x-rg4c-cjqghigh

Allocation of Resources Without Limits or Throttling in Apache Avro

Jan 8, 2022
redhatCVE-2021-43045Moderate

apache-avro: allows attackers to allocate excessive resources potentially causing a DoS

Jan 6, 2022

References

lists.apache.org / thread/5fttw9vk6gd2p3b846nox7hcj5469xfd
Mailing ListVendor Advisory
openwall.com / lists/oss-security/2022/01/06/8
Mailing ListThird Party Advisory