CVE-2021-43082

Name: CVE-2021-43082
Creator: NVD / NIST
Published: 2021-11-03T16:15:08.23+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.33%

Last modified Jun 17, 2026

CVE-2021-43082 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the stats-over-http plugin of Apache Traffic Server allows an attacker to overwrite memory. This issue affects Apache Traffic Server 9.1.0.. EPSS estimates a 2.33% chance of exploitation in the next 30 days.

Description

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the stats-over-http plugin of Apache Traffic Server allows an attacker to overwrite memory. This issue affects Apache Traffic Server 9.1.0.

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

2.33%

81.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apache	Traffic Server	>= 8.0.0, <= 8.1.2
Apache	Traffic Server	>= 9.0.0, <= 9.1.0

References

https://lists.apache.org/thread/k01797hyncx53659wr3o72s5cvkc3164Mailing List, Patch, Vendor Advisory
https://lists.apache.org/thread/k01797hyncx53659wr3o72s5cvkc3164Mailing List, Patch, Vendor Advisory

Timeline

Published: Nov 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43082?

How severe is CVE-2021-43082?

CVE-2021-43082 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.33% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43082?

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-2021-43082?

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

Scan your code now

Source: NVD / NIST