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CVE-2026-88404VulnerabilityPublished

Remote Code Execution (RCE) Vulnerability

Source GCVE Database

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Authoritative record:CVE-2026-88404· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical.

Data as of 5 Nov 2026, 23:24 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 55% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Sep 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 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
GitHubczx1111/univerpkg:github/czx1111/univerOther threatsAffected
  • =1.0.0-alpha.2
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

A remote code execution (RCE) vulnerability exists in the UniscriptExecutionService.execute() function of Univer version 1.0.0-alpha.2. This flaw allows attackers to execute arbitrary code by sending a crafted payload to the affected function.

References

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