CVE-2020-0884Network attack vector

Reply spoofing via unsecured non-SSL URL

Published Mar 12, 2020 · Updated Aug 4, 2024

Cleartext transmission in Microsoft Visual Studio 2017 15.1 through 15.8 and 2019 16.0 through 16.3 allows remote attackers to spoof replies. Visual Studio places a reply URL on an unencrypted connection instead of requiring SSL, exposing the reply to interception and origin impersonation. Exploitation requires access to the cleartext network exchange, and the published impact is limited to disclosure of reply data.

CVSS severity3.7
Low
EPSS probability1.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Microsoft Visual Studio 2017 15.1 through 15.8 and 2019 16.0 through 16.3 allows remote attackers to spoof replies. Visual Studio places a reply URL on an unencrypted connection instead of requiring SSL, exposing the reply to interception and origin impersonation. Exploitation requires access to the cleartext network exchange, and the published impact is limited to disclosure of reply data.

The record

CVE
CVE-2020-0884
Published
Mar 12, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
Microsoft Visual Studio 2019
Classifications
CWE-319, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Visual Studio 2019version=16.0
Microsoft · Microsoft Visual Studio 2019 version 16.4version=unspecified
Microsoft · Microsoft Visual Studio 2017version=unspecified

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
3.7NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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