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Vulnerability record · CVE-2021-43082 · published 3 November 2021

CVE-2021-43082: Apache traffic server classic buffer overflow vulnerability

Apache · Traffic Server

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.

9.8 CVSS 3.1 Critical EPSS 2.4% · top 16.6% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score, v2 7.5
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.apache.org/thread/k01797hyncx53659wr3o72s5cvkc3164 Mailing ListPatchVendor Advisory
https://lists.apache.org/thread/k01797hyncx53659wr3o72s5cvkc3164 Mailing ListPatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-43082), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.