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CVE-2026-99220VulnerabilityPublished Updated

Microsoft · asymmetric_keys: reject trust keys without IDs

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99220· High

Not known to be exploited · fixed in 9695df3b1db4ac4534274d38ee16e3b9b0bf910e : patch Microsoft soon.

Data as of 7 Nov 2026, 13:03 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 9695df3b1db4ac4534274d38ee16e3b9b0bf910e, 889a2293a95f6c2880bf73b67f9b0af23251a128, 57e54b6939c6539d90a81c7e57531901d5991651 +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 3c58b2362ba828ee2970c66c6a6fd7b04fde4413, < 9695df3b1db4ac4534274d38ee16e3b9b0bf910e
Fixed in
  • 9695df3b1db4ac4534274d38ee16e3b9b0bf910e
LinuxLinuxAffected
  • ≥ 3c58b2362ba828ee2970c66c6a6fd7b04fde4413, < 889a2293a95f6c2880bf73b67f9b0af23251a128
Fixed in
  • 889a2293a95f6c2880bf73b67f9b0af23251a128
LinuxLinuxAffected
  • ≥ 3c58b2362ba828ee2970c66c6a6fd7b04fde4413, < 57e54b6939c6539d90a81c7e57531901d5991651
Fixed in
  • 57e54b6939c6539d90a81c7e57531901d5991651
LinuxLinuxAffected
  • ≥ 3c58b2362ba828ee2970c66c6a6fd7b04fde4413, < 33a078f04e264eb71aa9f209cb334e4010123818
Fixed in
  • 33a078f04e264eb71aa9f209cb334e4010123818
LinuxLinuxAffected
  • ≥ 3c58b2362ba828ee2970c66c6a6fd7b04fde4413, < 7f0728ba89624e25df2bb80ff59bbfb545060935
Fixed in
  • 7f0728ba89624e25df2bb80ff59bbfb545060935
LinuxLinuxAffected
  • ≥ 3c58b2362ba828ee2970c66c6a6fd7b04fde4413, < 2a40bdd4409567de4c2a141ac66439dc238af752
Fixed in
  • 2a40bdd4409567de4c2a141ac66439dc238af752

Description

CVE-2026-99220 concerns the rejection of trust keys without IDs in Microsoft software version 3.0. The vulnerability is documented by the Microsoft Security Response Center but lacks detailed public technical information and a CVSS score.

References

Community reviews

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