# SZB-2765c964a0: SecurityWeek reports Barracuda ESG auth bypass and command injection can chain to root

SecurityWeek reports that an authentication bypass and a command injection flaw can be chained to gain root access on Barracuda's Email Security Gateway appliances. The item does not provide CVE identifiers, a patch status, or evidence that the flaws have been exploited.

- Type: Early warning
- Kind: Vulnerability
- Vendor: Barracuda
- Product: Email Security Gateway
- Status: Reported, not confirmed
- Sources: 1 distinct
- First seen: 2026-11-04 14:28 UTC

> No statement or filing from Barracuda has reached cve.now yet. Every claim below is quoted from, and linked to, the source that made it.

Written by a model from the sources below. Verify against them.

## What to do

- Check Barracuda's security advisories for a fix and apply it as soon as it is available
- Restrict administrative access to ESG appliances to trusted networks
- Review appliance logs for unexpected authentication events or unknown commands
- Confirm that no unauthorized accounts or processes exist on ESG appliances

## Timeline

- 2026-11-04 14:24 UTC: Made public by SecurityWeek
- 2026-11-04 14:28 UTC: First seen by cve.now

## Evidence (1 source)

- 2026-11-04 · Press · [SecurityWeek](https://www.securityweek.com/barracuda-email-security-gateway-authentication-bypass-opens-path-to-root/): “An authentication bypass and a command injection flaw can be chained for root access on Barracuda’s Email Security Gateway appliances.”

## Corrections

None so far.

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## Questions about SZB-2765c964a0

### Has Barracuda confirmed it?

SecurityWeek reports it. No statement from Barracuda has reached cve.now yet.

Source: https://www.securityweek.com/barracuda-email-security-gateway-authentication-bypass-opens-path-to-root/

### What should Barracuda users do?

Check Barracuda's security advisories for a fix and apply it as soon as it is available. Restrict administrative access to ESG appliances to trusted networks. Review appliance logs for unexpected authentication events or unknown commands. Confirm that no unauthorized accounts or processes exist on ESG appliances.

## Related

- Browse: [Early warnings](https://cve.now/early-warnings.md)

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