CVE-2021-34066

Name: CVE-2021-34066
Creator: NVD / NIST
Published: 2021-08-30T19:15:08.703+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.96%

Last modified Jun 17, 2026

CVE-2021-34066 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in EdgeGallery/developer before v1.0. There is a "Deserialization of yaml file" vulnerability that can allow attackers to execute system command through uploading the malicious constructed YAML file.. EPSS estimates a 1.96% chance of exploitation in the next 30 days.

Description

An issue was discovered in EdgeGallery/developer before v1.0. There is a "Deserialization of yaml file" vulnerability that can allow attackers to execute system command through uploading the malicious constructed YAML file.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.96%

77.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Edgegallery	Developer-Be	< 1.0

References

https://github.com/EdgeGallery/developer-be/issues/1Exploit, Third Party Advisory
https://github.com/EdgeGallery/developer-be/issues/1Exploit, Third Party Advisory

Timeline

Published: Aug 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34066?

How severe is CVE-2021-34066?

CVE-2021-34066 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.96% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34066?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34066?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST