CVE-2023-7102Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via conditional-format string eval

Published Dec 24, 2023 · Updated Aug 2, 2024

Code injection in Barracuda Email Security Gateway 5.1.3.001 through 9.2.1.001 allows remote attackers to execute code via Excel email attachments. Spreadsheet::ParseExcel Utility.pm ExcelFmt concatenates a cell conditional-format operator and value into Perl string eval without validation. Delivery requires only an inbound crafted Excel attachment; successful execution occurs during Amavis scanning and can install malware on the appliance.

CVSS severity9.8
Critical
EPSS probability44.57%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Barracuda Email Security Gateway 5.1.3.001 through 9.2.1.001 allows remote attackers to execute code via Excel email attachments. Spreadsheet::ParseExcel Utility.pm ExcelFmt concatenates a cell conditional-format operator and value into Perl string eval without validation. Delivery requires only an inbound crafted Excel attachment; successful execution occurs during Amavis scanning and can install malware on the appliance.

The record

CVE
CVE-2023-7102
Published
Dec 24, 2023
Updated
Aug 2, 2024
Vendor
Barracuda Networks
Product
Barracuda Email Security Gateway
Classifications
CWE-1104, T1190, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.1.3.001 <=9.2.1.001 changes=[{"at":"Patched in all active versions by security update removing the vulnerable logic.","status":"affected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Barracuda Networks · Barracuda Email Security Gatewayversion=5.1.3.001 <=9.2.1.001 changes=[{"at":"Patched in all active versions by security update removing the vulnerable logic.","status":"affected"}]

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-1104Use of Unmaintained Third Party Components
T1190Exploit Public-Facing Application
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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