VulnerabilityPublished 23 Feb 2026

CVE-2026-22567: Zscaler ZIA Admin UI · Improper Input Validation

Affects Zscaler ZIA Admin UISource CVE Database V5

Not known to be exploited · CVSS 7.6 High : upgrade to 6.2r soon.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

7.6High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 6.2r

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Changed
Confidentiality: High
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Zscaler ZIA Admin UI to 6.2r.

Affected software

Product	Affected	Fixed in
ZscalerZIA Admin UI	Affected >=6.2 <6.2r	Fixed in 6.2r

AI-suggested

To mitigate CVE-2026-22567, organizations should first verify if they are running Zscaler ZIA Admin UI version 6.2 and restrict administrative access strictly to trusted personnel. Implement strong multi-factor authentication (MFA) for all admin accounts to reduce the risk of credential compromise. Monitor administrative activities closely for unusual or unauthorized backend function calls. Employ network segmentation and least privilege principles to limit access to the ZIA Admin UI. Since no patches are currently available, consider deploying Web Application Firewalls (WAFs) or input validation proxies that can detect and block suspicious input patterns targeting the admin UI. Regularly audit and rotate administrative credentials and review logs for signs of exploitation attempts. Engage with Zscaler support for updates on patch availability and apply them promptly once released. Additionally, conduct internal security training to raise awareness about the risks of improper input handling and the importance of safeguarding admin credentials.

Description

Improper validation of user-supplied input in the ZIA Admin UI could allow an authenticated administrator to initiate backend functions through specific input fields in limited scenarios.

Impact

The primary impact of CVE-2026-22567 is on the confidentiality of organizational data managed through the Zscaler ZIA Admin UI. An attacker with administrative access could exploit this vulnerability to access or leak sensitive backend information, potentially exposing internal security configurations or user data. The integrity impact is limited but could allow some unauthorized backend operations, potentially leading to misconfigurations or partial data manipulation. Availability is not affected, so service disruption is unlikely. Given that the vulnerability requires administrative privileges, the risk is elevated in environments where admin credentials are compromised or insufficiently protected. Organizations relying heavily on Zscaler for cloud security and web traffic filtering could face increased risk of insider threats or lateral movement by attackers. The vulnerability could also undermine trust in the security posture of affected enterprises, especially those in regulated industries.

CWE-20Improper Input Validation (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #18OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Architecture and Design · Attack Surface Reduction
Consider using language-theoretic security (LangSec) techniques that characterize inputs using a formal language and build "recognizers" for that language. This effectively requires parsing to be a distinct layer that effectively enforces a boundary between raw input and internal data representations, instead of…
Architecture and Design · Libraries or Frameworks
Use an input validation framework such as Struts or the OWASP ESAPI Validation API. Note that using a framework does not automatically address all input validation problems; be mindful of weaknesses that could arise from misusing the framework itself (CWE-1173).
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter the product, including but not limited to: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any…
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
Injection Prevention (opens in a new tab)
SQL Injection Prevention (opens in a new tab)
Injection Prevention in Java (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
Attack patterns
Buffer Overflow via Environment Variables (opens in a new tab)
Server Side Include (SSI) Injection (opens in a new tab)
Cross Zone Scripting (opens in a new tab)
Command Line Execution through SQL Injection (opens in a new tab)
Object Relational Mapping Injection (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

help.zscaler.com/zia/release-upgrade-summary-2025?applicable_category=zscalertwo.net&deployment_date=2025-12-17&id=1538575 (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 3 Mar 2026, 01:49 UTC

WeaknessesCWE-20

Technical details

References

Community reviews

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