CVE-2021-26415
mediumpriority · track · 29EPSS 0.036 · 89 %ileexploit · PoCEURUUSgrimoire priorityP1 · Urgent
Exploitable?
Public exploit
1 exploit · PoC
Likely / severe?
3.57% (89th) EPSS
CVSS 4.6 · medium
Who says so?
3 sources
cnnvd · enisa_euvd · fstec_bdu
EPSS · scored 2026-10-27
Windows Installer Elevation of Privilege Vulnerability
01
cvss
Technical severity, 0–10. One row per scoring source.
7.8
010
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.1–7.8
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · NVD / NIST USexploitability 1.8 · impact 5.9
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 1.8 · impact 5.9
02
weaknesses
The CWE weakness classes this flaw belongs to.
03
exploits (1)
Public proof-of-concept and weaponised exploit code.
04
affected products (69)
Products and version ranges known to be affected.
showing 20 of 69
05
also known as (4)
Other names and identifiers for this entity.
06
sources
Which sources assert this record, and when.
08
references (9)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2021-26415cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26415cnnvd
- https://vigilance.fr/vulnerability/Windows-vulnerabilities-of-April-2021-35071cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021041312cnnvd
- https://www.zerodayinitiative.com/advisories/ZDI-21-409/cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26415enisa_euvd
- https://www.zerodayinitiative.com/advisories/ZDI-21-409/enisa_euvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26415PatchVendor Advisorynvd
scry
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