Microsoft · AES-GCM-SIV AAD Forgery After Zero-length Incremental AAD Update
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in 4.1.1 : patch Microsoft soon.
Data as of 15 Nov 2026, 10:24 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in 4.1.1, 4.0.4, 3.5.10
Exploitation evidence
Disclosed: evidence found.
CVE published 10 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 14 Nov 2026.
What to do
Upgrade OpenSSL to 4.1.1, 4.0.4 or 3.5.10.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| OpenSSLOpenSSL | Affected
| Fixed in
|
| OpenSSLOpenSSL | Affected
| Fixed in
|
| OpenSSLOpenSSL | Affected
| Fixed in
|
Description
CVE-2026-88823 is a vulnerability in Microsoft product version 3.0 involving AES-GCM-SIV authenticated encryption. It relates to an AAD (Additional Authenticated Data) forgery issue triggered after a zero-length incremental AAD update. No CVSS score or detailed impact information is provided.