CVE-2023-21752 | Windows Backup Service Elevation of Privilege Vulnerability

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Windows Backup Service Elevation of Privilege Vulnerability

Published: 2023-01-10 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-21752 is rated High Exploit Risk (82.5/100): CVSS High severity, with high exploitation likelihood (EPSS 37.93%, 97th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +5.12% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2023-21752

EDB-ID Source Kind Published Link
51203 exploit_db edb 2023-04-03 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-21752

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-09 32.81% 37.93% +5.12%
2 2026-05-10 32.98% 32.81% -0.17%
3 2026-05-09 — 32.98% —

Full EPSS history (50 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-21752

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.1 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.2 [email protected]

Weakness enumeration for CVE-2023-21752

Affected software / configurations for CVE-2023-21752

Vendor Product Version Raw CPE
microsoft windows_10 — cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
microsoft windows_10 20h2 cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:*
microsoft windows_10 21h2 cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:*:*
microsoft windows_10 22h2 cpe:2.3:o:microsoft:windows_10:22h2:*:*:*:*:*:*:*
microsoft windows_10 1607 cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
microsoft windows_10 1809 cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*
microsoft windows_11 — cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:arm64:*
microsoft windows_11 — cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:x64:*
microsoft windows_11 21h2 cpe:2.3:o:microsoft:windows_11:21h2:*:*:*:*:*:arm64:*
microsoft windows_11 21h2 cpe:2.3:o:microsoft:windows_11:21h2:*:*:*:*:*:x64:*
microsoft windows_11 22h2 cpe:2.3:o:microsoft:windows_11:22h2:*:*:*:*:*:arm64:*
microsoft windows_11 22h2 cpe:2.3:o:microsoft:windows_11:22h2:*:*:*:*:*:x64:*
microsoft windows_7 — cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*

References for CVE-2023-21752

cvelogic Threat Intelligence