A security feature bypass vulnerability exists in SQL Server Reporting Services (SSRS) when the server improperly validates attachments uploaded to reports. An attacker who successfully exploited this vulnerability could upload file types that were disallowed by an administrator.
\nTo exploit the vulnerability, an authenticated attacker would need to send a specially crafted request to an affected SSRS server.
\nThe update addresses the vulnerability by modifying how SSRS validates attachment uploads.
","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-20"],"references":["https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1044","https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1044"],"products":["microsoft:sql_server_reporting_services"],"source":"nvd","synced_at":"2026-10-19T21:09:20.498348299+00:00"},"epss":{"cve":"CVE-2020-1044","score":0.01961,"percentile":0.80318,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}