CVE-2026-116606
This CVE is being exploited. Apply the vendor fix, or take the service off the internet until you can, then check your logs for attempts.
What it is
An authentication bypass in Barracuda Email Security Gateway versions earlier than 9.4.0.030 allows an unauthenticated remote attacker to invoke a configuration-import function and restore a crafted, compatible backup archive, resulting in unauthorized modification of the appliance’s global configuration.
Live exploitation on the huntback network (30 days)
Detection
Evidence
Confirmed exploited. Our decoys saw 71 exploitation attempts in the last 14 days; CISA added it to KEV 2 days ago.
Last attempt. 71 attempts on our decoys, 71 in the last 14 days
Reported exploited in the wild: CISA ADP SSVC decision: Exploitation active
Added to CISA Known Exploited Vulnerabilities
First exploitation attempt on our decoys
Experts Demonstrate Barracuda Email Security Gateway Chain Enabling Root Access Without Login
Barracuda Flaws Could Be Chained to Bypass Authorization and Gain Root Access
Published
2 public proof-of-concept repos
Nuclei detection template available
Observed: our own decoys saw it. Reported: CISA, the vendor or another named source says so. Weaponised: public exploit code or a scanner template exists. Methodology
Questions
Is CVE-2026-116606 being exploited in the wild?
Yes. The huntback decoy network captured 71 exploitation attempts from 21 distinct source IPs; the most recent was on 2026-11-10. It is also in the CISA KEV catalogue.
Can CVE-2026-116606 be detected on the network?
Yes. huntback carries a network signature for CVE-2026-116606, so attempts against a decoy are tagged in real time.
How huntback helps
Deploy a decoy that emulates Email Security Gateway 300 and you will see every attempt at this CVE the moment it lands, with the full payload, the attacker's infrastructure, and any stage-2 loader. Then huntback can scan the attacker back.
Related
NVD record → Browse all CVEs → Live malware and C2 finds → Novel-attack discovery → Deploy a decoy →API
This record, with its evidence timeline, as JSON:
curl -H "X-API-Key: $HUNTBACK_KEY" https://app.huntback.io/api/v1/evidence/CVE-2026-116606