CVE-2026-23656 json
Windows App Installer Spoofing Vulnerability
published 2026-03-10 8 mo ago modified 2026-06-19 4 mo ago also EUVD-2026-10579
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
Insufficient verification of data authenticity in Windows App Installer allows an unauthorized attacker to perform spoofing over a network.
Patch / fix
- Microsoft Windows App Client for Windows Desktop 2.0.964
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C |
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected products
- Microsoft Windows App Client for Windows Desktop
Classification
- Weakness
-
- CWE-345 Insufficient Verification of Data Authenticity
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-23656
vendor-advisory, patch
Sources
- CVE List CVE-2026-23656
- NVD CVE-2026-23656
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.