7.5

CVE-2021-32566: apache software foundation apache traffic server Improper Input Validation

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-32566DEBIAN-CVE-2021-32566
Published 30-06-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-32566 is a high (CVSS 7.5) Improper Input Validation vulnerability in apache software foundation apache traffic server. EPSS estimates a 2.45% chance of exploitation in the next 30 days, higher than 84% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
2.45%
0%100%
Low · -0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
DSA-4957-1

Timeline

  1. 30-06-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.45%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

-0.07 pp

From 2.51% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
Apache1 product
  • traffic_server≥ 7.0.0, ≤ 7.1.12 | ≥ 8.0.0, ≤ 8.1.1 | ≥ 9.0.0, ≤ 9.0.1
Apache software foundation1 product
Ubuntu1 product
  • trafficserverAll versions (No fix recorded)

4 vendors · 5 products

References

9 links