Vulnerability · ZDI-26-606
ZDI-26-606: Microsoft Windows Compatibility Appraiser Link Following Local Privilege Escalation Vulnerability
Published Aug 24, 2026 · Microsoft Windows Compatibility Appraiser
Open the advisory
Exploitation likelihood is not on this record for ZDI-26-606. A missing EPSS score is not a low risk. Compare Microsoft Windows Compatibility Appraiser with the linked advisory before you change production.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (Microsoft Windows Compatibility Appraiser).
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- EPSS is missing. A missing score is not a low risk.
- Severity
- High7.0
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- Awaiting synchronization with FIRST
- Remediation
- Not established
- Affected products
- See sources for product scope
This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code in the context of LOCAL SERVICE on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.0.
No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.
How to fix ZDI-26-606
Recommended remediation
No required-action text, fix commit, or clear fixed-version range is stored yet.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
Exploitation likelihood is not on this record for ZDI-26-606. A missing EPSS score is not a low risk. Compare Microsoft Windows Compatibility Appraiser with the linked advisory before you change production.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Aug 24, 2026 · Catalog
Detected
This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code in the context of LOCAL SERVICE on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.0.
Sources
- Zero Day InitiativeCoordinated disclosureZDI-26-606
This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code in the context of LOCAL SERVICE on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.0.
zerodayinitiative.com
Freshness
Last verified in this catalog Unknown date. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.