ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-55315

Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.

Published Oct 14, 2025 · catalog updated Feb 22, 2026 · Microsoft Microsoft Visual Studio 2022 version 17.12

Last checked Oct 24, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2025-55315 is not in CISA KEV. FIRST estimates a 66.53% chance of exploitation in the next 30 days. Check whether you run Microsoft Microsoft Visual Studio 2022 version 17.12.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
66.53%
Remediation
Version ranges on file
Affected products
vendor Microsoft Microsoft Visual Studio 2022 version 17.12 17.12.0 <17.12.13

Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Microsoft Microsoft Visual Studio 2022 version 17.12 17.12.0 <17.12.1317.12.0 <17.12.13

How to fix CVE-2025-55315

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-55315 is not in CISA KEV. FIRST estimates a 66.53% chance of exploitation in the next 30 days. Check whether you run Microsoft Microsoft Visual Studio 2022 version 17.12.

Which versions are affected?

Compare what you have installed with Microsoft Microsoft Visual Studio 2022 version 17.12 17.12.0 <17.12.13 17.12.0 <17.12.13. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 66.53%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2025 · EUVD

    Detected

    Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.

  2. Feb 22, 2026 · EUVD

    Updated

    Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.

Sources

  • CVE.orgVulnerability recordCVE-2025-55315

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-55315

    30-day exploitation probability 66.53%

    first.org
  • EUVDVulnerability recordEUVD-2025-34426

    Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.

    euvd.enisa.europa.eu
  • Exploit DatabasePublic exploit reference52492

    Public exploit archive reference. This is not confirmation of exploitation. The exploit body is not stored here.

    exploit-db.com

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Exploit DatabaseOct 24, 2026
  • CVE.orgOct 23, 2026
  • FIRST EPSSOct 23, 2026
  • EUVDOct 23, 2026