Listen to this Post
CVE-2026-1696 is a vulnerability in arcinfo PcVue’s web server components (WebVue, WebScheduler, TouchVue, SnapVue) where specific HTTP security headers are missing from responses . This misconfiguration occurs because the server fails to set headers like X-Frame-Options, X-Content-Type-Options, and fails to remove information-disclosing headers like `X-Powered-By` . The missing headers weaken the browser’s security posture against attacks. Specifically, the absence of `X-Frame-Options` could allow clickjacking, while missing `X-Content-Type-Options` might permit MIME-sniffing attacks. The vulnerability is linked to CWE-79 (Cross-site Scripting) as these headers are crucial for mitigating XSS risks . An attacker could potentially exploit this by combining it with other vectors to inject malicious scripts, as the application also fails to properly neutralize input . The CVSS v4.0 score is 2.3 (Low), with a network attack vector but high attack complexity and required user interaction . No active exploitation or public PoC is currently known . Affected versions include PcVue 12.0.0, and versions from 15.0.0 up to 15.2.13, and 16.0.0 up to 16.3.3 .
dailycve form:
Platform: arcinfo PcVue
Version: 12.0.0-16.3.3
Vulnerability : Missing HTTP headers
Severity: Low
date: 2026-02-26
Prediction: Patch by mid-March 2026
What Undercode Say:
Analytics
The vulnerability was published on 2026-02-26 and last modified on 2026-03-12 . It has a CVSS v4.0 base score of 2.3 (Low) with the vector `CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y/R:U/RE:M/U:Clear` . The attack complexity is high, requires passive user interaction, and is automatable . SSVC metrics indicate exploitation is “none” and technical impact is “partial” . The vulnerability is associated with CWE-79 .
Bash/PowerShell Commands & Code
The official mitigation involves manually editing the IIS `web.config` file to add security headers and remove information-disclosing ones .
Locate the web.config file:
Navigate to the PcVue website directory in IIS cd C:\inetpub\<SV Website> List the contents to verify web.config exists dir
Backup the existing configuration:
Copy-Item .\web.config .\web.config.backup
Add secure headers to the `
Load the web.config file
[bash]$config = Get-Content .\web.config
Ensure the customHeaders section exists
$customHeaders = $config.configuration.'system.webServer'.customHeaders
if (-not $customHeaders) {
$customHeaders = $config.CreateElement('customHeaders')
$config.configuration.'system.webServer'.AppendChild($customHeaders) | Out-Null
}
Add or update the headers
$headersToAdd = @(
@{name='X-Frame-Options'; value='DENY'},
@{name='X-XSS-Protection'; value='0'},
@{name='X-Content-Type-Options'; value='nosniff'}
)
foreach ($h in $headersToAdd) {
$existingHeader = $customHeaders.SelectSingleNode("add[@name='$($h.name)']")
if ($existingHeader) {
$existingHeader.value = $h.value
} else {
$addNode = $config.CreateElement('add')
$addNode.SetAttribute('name', $h.name)
$addNode.SetAttribute('value', $h.value)
$customHeaders.AppendChild($addNode) | Out-Null
}
}
Remove the X-Powered-By header
$removeNode = $config.CreateElement('remove')
$removeNode.SetAttribute('name', 'X-Powered-By')
$customHeaders.AppendChild($removeNode) | Out-Null
Save the changes
$config.Save('.\web.config')
How Exploit
- Precondition: An attacker must lure an authenticated user to interact with a malicious page or link while their session is active .
- Mechanism: The attacker hosts a crafted website that, when visited by the victim, sends a request to the vulnerable PcVue web server.
- Trigger: Due to missing `X-Frame-Options` header, the attacker could potentially frame the PcVue application (clickjacking). With missing
X-Content-Type-Options, they might trick the browser into interpreting a harmless file as executable script. If combined with an input validation flaw, the attacker could inject a script that executes in the context of the PcVue application . - Outcome: The attacker could perform actions on behalf of the user, steal session cookies, or deface the web interface. However, no public exploit code exists .
Protection from this CVE
Immediate Mitigation: Manually configure HTTP headers in IIS as shown in the commands above .
Vendor Patch: Apply the official security update from arcinfo when released (refer to SB2026-2) .
Network Segmentation: Isolate PcVue systems behind firewalls and VPNs, limiting exposure to trusted networks .
Disable Unused Features: If web features (WebVue, WebScheduler, etc.) are not required, do not install them .
Impact
Confidentiality (Low): Successful exploitation could lead to disclosure of session tokens or other sensitive information, but only within the browser’s scope (subsequent system impact) .
Integrity (None): The vulnerability does not directly allow modification of server data .
Availability (None): The vulnerability does not cause service disruption .
Privilege Escalation: No direct privilege escalation, but an attacker could perform privileged actions if they hijack an admin’s session.
Attack Chain: This weakness could be used as part of a multi-stage attack to achieve script execution in an industrial control system environment .
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
