Vulnerability

CVE-2023-2868

Critical· 9.4KEVEXPLOITCVSS9.4EPSS87%

.rules3/5

Barracuda Networks ESG Appliance Improper Input Validation Vulnerability

Barracuda Email Security Gateway (ESG) appliance contains an improper input validation vulnerability of a user-supplied .tar file, leading to remote command injection.

Threat signal

100/100

Severe

Severity

critical

CVSS

9.4

EPSS

87%

Active

KEV

CISA KEV — actively exploited

1096d overdue

AffectedBarracuda Networks — Email Security Gateway (ESG) Appliance

Added to KEV

2023-05-26

Federal patch due (BOD 22-01)

2023-06-16

Required action (CISA verbatim)

Apply updates per vendor instructions.

Vendor advisory + references

CISA description: “Barracuda Email Security Gateway (ESG) appliance contains an improper input validation vulnerability of a user-supplied .tar file, leading to remote command injection.”

CVSS

v3.1Open in FIRST calculator →

9.4/ 10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityLowNo special conditions — exploit works reliably.
Privileges RequiredNoneUnauthenticated — no credentials needed.
User InteractionNoneFully automated — no victim action needed.
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactHighTotal compromise of integrity — full data modification possible.
Availability ImpactLowReduced performance / interruptions.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

87.0%

probability of exploitation in next 30 days

p100

higher than 100% of all CVEs

6-day trend↓ 2.3pp

Statistically about to be weaponized — top-tier triage urgency.

Vendor VEX

No VEX statements published for CVE-2023-2868. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAct

Active exploitation with total impact on essential/support systems

exploitation: active
automatable: yes
impact: total
mission: support

Lifecycle

2023-05-26Added to CISA KEVransomware: Unknown
2023-05-26Public exploit observedmetasploit
2023-05-26Published
2023-06-16Federal patch due (BOD 22-01)
2026-06-15Last modified1 source

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.