Which versions are affected?

Affected product and version evidence is listed in the product table above. Current public advisories should be checked for exact version scope before patch targeting is finalized.

Is there active exploitation?

Active exploitation is not confirmed from current sources for CVE-2026-84388. If exploitation is not confirmed from current sources, teams should document that status and continue monitoring KEV, vendor, and telemetry updates.

No. CVE-2026-84388 is not listed in CISA KEV in the supplied enrichment data. KEV status should be monitored because it can change after initial disclosure or after exploitation becomes publicly confirmed.

Is there a public exploit?

2 public PoC repositories reported; 0 marked weaponized in current dataset. Public exploit or PoC availability should raise triage priority, especially for exposed or business-critical systems.

How can defenders detect it?

Start with web/proxy/WAF logs, application logs, network IDS/IPS where available. Look for vulnerability-class behavior, product errors, suspicious authentication events, exploit probes, and abnormal process activity based only on evidence that applies to the affected product.

How should teams prioritize it?

Prioritize CVE-2026-84388 using CVSS 9.6, EPSS 0%, KEV status, public PoC status, and asset exposure. Internet-facing, privileged, or business-critical deployments should be handled first.

Are workarounds available?

Workarounds are not confirmed from current sources. Fixed-version evidence is listed in the mitigation section above.

Which threat actors are linked publicly?

No public threat actor linkage is confirmed from current sources. Do not attribute exploitation to a threat actor unless the source evidence explicitly supports that linkage.

What should be done in the next 24 hours?

Identify exposed assets running affected vendor/product/version combinations. Prioritize based on EPSS, PoC availability, and external exposure. Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class. Open remediation tickets with affected assets, owners, evidence status, and detection coverage so decisions are traceable.

criticalpublic exploit

CVE-2026-84388

CVE-2026-84388 — A improper restriction of rendered ui layers or frames vulnerability in Fortinet FortiPAM Chrome Extension 8.0 all versions, FortiPAM…

A improper restriction of rendered ui layers or frames vulnerability in Fortinet FortiPAM Chrome Extension 8.0 all versions, FortiPAM Chrome Extension 7.4 all versions may allow attacker to information disclosure via remote unauthenticated attack

Published Sep 22, 2026Updated Sep 27, 2026Sources: NVD, Fortinet (CNA), GitHub, SOCRadar CTI

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Exploit code

public exploit, none observed

EPSS

ahead of 0% of scored CVEs

Affects

Fortinet

FortiPAM Chrome Extension

CVSS base

9.6

critical · 2 sources

Remediation

The vendor's own words where we have them.

Please refer to the Fortinet advisory for mitigation details.

First 24 hours

Ordered from the record's own fields — exposure first, because you cannot patch what you have not found.

Identify exposed assets running affected vendor/product/version combinations.
Prioritize based on EPSS, PoC availability, and external exposure.
Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class.

Affected scope

Vendor, product and version as the advisories word them.

Vendor	Product	Versions	Status
Fortinet	FortiPAM Chrome Extension	8.0.1	Vulnerable

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Availability

Low

Confidentiality

High

Integrity

High

Scope

Changed

Attack Complexity

Low

Attack Vector

Network

Privileges Req

None

User Interaction

Required

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Source
9.6	CVSS 3.1	critical	2.8	6	Fortinet (CNA)
9.1	CVSS 3.1	critical	—	—	Fortinet (CNA)

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

What this weakness leads to

MITRE's own consequences and mitigations for the weakness class — the authority's wording, not guidance derived from the CVSS vector.

MITRE

CWE-1021 · Improper Restriction of Rendered UI Layers or Frames

Gain Privileges or Assume Identity
Bypass Protection Mechanism
Read Application Data
Modify Application Data

Mitigation: The use of X-Frame-Options allows developers of web content to restrict the usage of their application within the form of overlays, frames, or iFrames. The developer can indicate from which domains can frame the content. The concept of X-Frame-Options is well documented, but implementation of this protection mechanism is in development to cover gaps. There is a need for allowing frames from multiple domains.

Weakness & attack patterns

CWE-1021

Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.

CAPEC-103 · ClickjackingCAPEC-654 · Credential Prompt ImpersonationCAPEC-506 · TapjackingCAPEC-222 · iFrame OverlayCAPEC-181 · Flash File OverlayCAPEC-504 · Task Impersonation

T1036.004Masquerading: Masquerade Task or Service
T1056Input Capture
T1548.004Abuse Elevation Control Mechanism: Elevated Execution with Prompt

Public exploit

Capability, not use: code existing is a different claim from anyone running it.

Repositories

Social mentions

Posts naming this CVE. Attention, not evidence of exploitation — it spikes on disclosure and decays whether or not anything is exploited.

Detection

Read off the CVSS vector and the weakness class. Starting points, not rules we have tested.

Prioritize edge telemetry for network-reachable FortiPAM Chrome Extension.
Monitor for scanner or exploit-pattern traffic after 2 public PoC repositories were reported.

web/proxy/WAF logsapplication logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first — with the readings a source repeats on a schedule counted underneath rather than listed.

2026
Added · CVSS 3.1 9.6 (AV:N)
Sep 27, 2026 · NVD
Initial · CVE published
Sep 22, 2026 · NVD
CVE published by MITRE.
Sep 22, 2026 · SOCRadar CTI

Source activity

Readings a source repeats on a schedule, counted rather than listed.

1×Tweets · 2 times tweeted.Sep 10, 2026 · SOCRadar CTI
1×CVE appeared in the Cve Trends.Sep 10, 2026 · SOCRadar CTI
1×SVRS is calculatedSep 10, 2026 · SOCRadar CTI

References

1 on the record

fortiguard.fortinet.com/psirt/FG-IR-26-168
Vendor Advisory, Mitre

Coverage

3 stories from the feeds we poll

Elsewhere on this site

Fortinetevery CVE for this vendor
Unclassifiedsame class
CWE-1021other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record1

What should defenders know first?

CVE-2026-84388 is A improper restriction of rendered ui layers or frames vulnerability in Fortinet FortiPAM Chrome Extension 8.0 all versions, FortiPAM…, a critical vulnerability affecting FortiPAM Chrome Extension from Fortinet. The current evidence does not list it in CISA KEV, and the exploit status is: Active exploitation is not confirmed from current sources for CVE-2026-84388. Public exploit evidence is: 2 public PoC repositories reported; 0 marked weaponized in current dataset. The affected-version evidence is listed in the key facts and affected products tables. Defenders should first verify whether exposed or business-critical assets run those versions, then apply vendor patches or mitigations, restrict reachable attack surface, and preserve logs for detection review. CVSS 9.6 describes technical severity, while EPSS 0% helps estimate near-term exploit likelihood; neither replaces asset context. Unknown fields should remain explicit in tickets, and threat actor, IOC, victimology, or payload claims should not be added unless a cited source supports them. Monitor CISA KEV, vendor advisories, NVD changes, public PoC repositories, and internal telemetry for update triggers.