CVE-2010-20109Public exploitNetwork attack vector

Unauthenticated file disclosure via locale path traversal

Published Aug 21, 2025 · Updated May 26, 2026

Path traversal in Barracuda Networks gateway products allows remote attackers to read arbitrary files without authentication. The view_help.cgi endpoint uses the locale parameter as a file path without rejecting traversal sequences or null-byte terminators, so a crafted request escapes the intended help-content directory. Affected SSL VPN and Web Application Firewall builds predate October 2010, while Email Security Gateway 4.1.1.021 and earlier can disclose configuration snapshots containing credentials and network settings.

CVSS severity8.7
High
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Barracuda Networks gateway products allows remote attackers to read arbitrary files without authentication. The view_help.cgi endpoint uses the locale parameter as a file path without rejecting traversal sequences or null-byte terminators, so a crafted request escapes the intended help-content directory. Affected SSL VPN and Web Application Firewall builds predate October 2010, while Email Security Gateway 4.1.1.021 and earlier can disclose configuration snapshots containing credentials and network settings.

The record

CVE
CVE-2010-20109
Published
Aug 21, 2025
Updated
May 26, 2026
Vendor
Barracuda Networks
Product
Barracuda SSL VPN
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2025CVE publishedPublication date reported by the CVE source.
  2. May 26, 2026Record 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=0 <=2010-10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Barracuda Networks · Barracuda SSL VPNversion=0 <=2010-10
Barracuda Networks · Barracuda Web Application Firewallversion=0 <=2010-10
Barracuda Networks · Barracuda Email Security Gatewayversion=0 <=4.1.1.021

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

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

Technologies

Your stack

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Your stack

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