CVE-2019-11510Known exploitationPublic exploitNetwork attack vector

Unauthenticated file disclosure via HTML5 path-validation bypass

Published May 8, 2019 · Updated Oct 21, 2025

Path traversal in Pulse Secure Pulse Connect Secure allows remote attackers to read appliance files via crafted HTTPS requests. The HTML5 Access static-resource check tests request->uri instead of the resolved request->filepath, so a guacamole path in the query string admits traversal outside the web root. HTTPS reachability is sufficient without login or user interaction; disclosed session IDs allow impersonation of active users even when client-certificate authentication is required.

CVSS severity10.0
Critical
EPSS probability100.00%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Pulse Secure Pulse Connect Secure allows remote attackers to read appliance files via crafted HTTPS requests. The HTML5 Access static-resource check tests request->uri instead of the resolved request->filepath, so a guacamole path in the query string admits traversal outside the web root. HTTPS reachability is sufficient without login or user interaction; disclosed session IDs allow impersonation of active users even when client-certificate authentication is required.

The record

CVE
CVE-2019-11510
Published
May 8, 2019
Updated
Oct 21, 2025
Vendor
Pulse Secure
Product
Pulse Connect Secure
Classifications
CWE-22, T1539, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2019CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pulse Secure · Pulse Connect Secureversion=n/a

Published CVSS scores

10.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.9MITRECVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 20262
Sep 23, 202616
Sep 24, 20261
Sep 25, 20261
Sep 26, 20263
Sep 27, 20263
Sep 28, 202618
Latest reporting daySep 28, 2026
Latest daily unique IPs18
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1539Steal Web Session Cookie
T1190Exploit Public-Facing Application

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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