Microsoft · CMS AuthEnvelopedData Processing May Accept Forged Messages
Affects MicrosoftSource GCVE Database
Not known to be exploited.
Data as of 29 Oct 2026, 19:04 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 1.0% chance of exploitation in 30 days – higher than 64% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 2 Jun 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 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Security Response Center Microsoft | Affected
| Fixed in– |
AI-suggested
Users should monitor official Microsoft Security Response Center updates for patches or workarounds.
Description
A vulnerability identified as CVE-2026-34182 affects Microsoft products involving CMS AuthEnvelopedData processing, which may accept forged messages. The issue relates to improper validation that could allow acceptance of maliciously crafted messages. No CVSS score is provided, and no public exploit or patch information is currently available.