Skip to main content
CVE-2026-5778VulnerabilityPublished Updated

sniffer ChaCha decrypt path · Integer Underflow Leads to Out-of-bounds Access

Affects MicrosoftSource GCVE Database

0

Not known to be exploited.

Data as of 27 Oct 2026, 00:13 UTC

Severity
Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Microsoft Security Response Center MicrosoftAffected
  • =3.0
  • =2.0
Fixed in–

Description

An integer underflow vulnerability in the sniffer ChaCha decrypt path of Microsoft software versions 2.0 and 3.0 can lead to out-of-bounds memory access. This flaw is identified as CVE-2026-5778 and is categorized under CWE-191 (Integer Underflow). No CVSS score or detailed impact information is provided.

References

Community reviews

Loading reviews…