5.5

CVE-2021-34532: microsoft asp.net_core

CVSS: 5.5v3.1MediumModified
AliasesGHSA-q7cg-43mg-qp69BIT-aspnet-core-2021-34532
Published 12-08-2021Last modified 10-08-2026
Open JSON

Vulnerability summary

CVE-2021-34532 is a medium (CVSS 5.5) vulnerability in microsoft asp.net_core. EPSS estimates a 1.22% chance of exploitation in the next 30 days, higher than 68.2% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.22%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4
RHSA-2021:3142RHSA-2021:3143RHSA-2021:3147RHSA-2021:3148

Timeline

  1. 12-08-2021
    PublishedVulnerability first disclosed.
  2. 10-08-2026
    Last modifiedVulnerability information updated.

Description

ASP.NET Core and Visual Studio Information Disclosure Vulnerability

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.22%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

+0.01 pp

From 1.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.22%

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

No weakness data has been published for this record.

Affected systems

Microsoft10 products
NuGet1 product
  • Microsoft.AspNetCore.Authentication.JwtBearer≥ 2.1.0, < 2.1.29 | ≥ 3.0.0, < 3.1.18 | ≥ 5.0.0, < 5.0.9

2 vendors · 11 products

References

5 links