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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 66.5%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
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 3.1
- 9.9 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
- EPSS
- 66.53% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · first 6 April 2026
- CISA KEV
- Not listed
- Weakness
- CWE-444
- Affected
- microsoft/asp.net core · microsoft/visual studio 2022
- Source
- secure@microsoft.com
EPSS 66.5% since 1 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.