7.8

CVE-2026-50649: microsoft microsoft .net framework 3.5 Deserialization of Untrusted Data

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-50649
Published 14-07-2026Last modified 08-10-2026
Open JSON

Vulnerability summary

CVE-2026-50649 is a high (CVSS 7.8) Deserialization of Untrusted Data vulnerability in microsoft microsoft .net framework 3.5. EPSS estimates a 4.02% chance of exploitation in the next 30 days, higher than 90.4% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
4.02%
0%100%
Low · +3.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16
RHSA-2026:27171RHSA-2026:41893RHSA-2026:41894RHSA-2026:41895RHSA-2026:41896RHSA-2026:41897

Timeline

  1. 14-07-2026
    PublishedVulnerability first disclosed.
  2. 08-10-2026
    Last modifiedVulnerability information updated.

Description

Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

4.02%

Chance of exploitation in the next 30 days

Percentile

90%

Versus all other CVEs

30-day change

+3.08 pp

From 0.94% on 19-09-2026

19-09-202619-10-2026
EPSS score
4.02%

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

Microsoft13 products
Ubuntu1 product
  • dotnet7All versions (No fix recorded)

2 vendors · 14 products

References

5 links