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Critical 9.9Published Oct 14, 2025
CVE-2025-55315Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.9 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
- Weakness (CWE)
- CWE-444
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft asp.net_core microsoft:asp.net_core | from 2.3.0 before 2.3.6; from 8.0.0 before 8.0.21; from 9.0.0 before 9.0.10 | NVD |
microsoft visual_studio_2022 microsoft:visual_studio_2022 | from 17.10.0 before 17.10.20; from 17.12.10 before 17.12.13; from 17.14.0 before 17.14.17 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315vendor-advisory
- https://andrewlock.net/understanding-the-worst-dotnet-vulnerability-request-smuggling-and-cve-2025-55315/
- https://gist.github.com/N3mes1s/d0897c13ca199e739ecc2b562f466040
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.