1. Executive summary
On 2026-09-15, CVE-2026-76460 was published for Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC): an incorrect use of privileged APIs that allows an unauthenticated, remote attacker to bypass the web-based management interface and gain unauthorized access to the affected device. ISE is a network access control and identity platform commonly deployed in financial services to enforce 802.1X, device posture and guest access, so a management-plane bypass is high-consequence wherever the admin interface is internet-reachable. The source entry is formatted as a CISA KEV record — it carries a "Required action" block and a remediation due date of 2026-09-19 — but no verified reference data was resolved for this item, so we cannot independently confirm KEV listing status, a CVSS score or a severity rating, and we do not assign one here. Bottom line for EMEA financial services: treat as urgent pending vendor confirmation — inventory ISE/ISE-PIC, restrict management-plane exposure, and apply Cisco's fix.
2. Regulatory framing
No specific DORA/NIS2 article is directly engaged by this item. CVE-2026-76460 is a vulnerability disclosure; the source records no exploitation in any client environment, and the only third-party involvement (Cisco as vendor) is generic. If a client confirms exploitation of ISE in its own environment, that becomes an ICT-related incident and DORA Art. 17/18/19 and NIS2 Art. 23 would then be engaged.
3. Technical analysis & attack chain
Confirmed steps, from the source only:
- Exposure / reconnaissance. The attacker identifies a reachable Cisco ISE or ISE-PIC web management interface. The source states the attack is unauthenticated and remote.
- Exploitation. The attacker exploits the incorrect use of privileged APIs in ISE/ISE-PIC.
- Bypass. The flaw allows the attacker to bypass the web-based management interface.
- Access. The attacker gains unauthorized access to the affected device.
The source provides no further technical detail: no affected version numbers, no port or protocol, no request structure, no post-exploitation behaviour, no persistence or lateral-movement detail. We do not speculate to fill that gap.
Related ISE reporting (caveated). Three related sources describe other Cisco ISE flaws, and the sources do not tie any of them to CVE-2026-76460:
- BSI Germany (corpus-1) rates a multiple-vulnerability ISE/ISE-PIC advisory as "hoch" (high), stating an attacker can execute arbitrary code, gain administrator rights, or disclose confidential information. This is a multi-CVE advisory, not a CVE-2026-76460-specific rating.
- SecurityWeek (corpus-3) describes a critical command-execution flaw in ISE caused by insufficient validation of user input, allowing access to the underlying OS and privilege escalation to root. This mechanism (input validation → OS → root) differs from the "incorrect use of privileged APIs → management-interface bypass" described for CVE-2026-76460 and may be a separate CVE.
- BSI Germany (corpus-4) describes an ISE file-manipulation flaw requiring an authenticated remote attacker — again a different mechanism and privilege requirement.
These are single-sourced claims about adjacent ISE vulnerabilities; treat them as context, not as confirmation of CVE-2026-76460's mechanism or impact. Verify against Cisco's advisory before acting.
Broader Cisco context (not this CVE). The remaining related sources are CISA KEV entries for other Cisco products — CVE-2026-76461 (Secure Email Gateway SQL injection, root command execution, due 2026-09-17), CVE-2026-20079 (Secure Firewall Management Center / SCC auth bypass, due 2026-09-12) and CVE-2026-20182 (Catalyst SD-WAN Controller auth bypass, due 2026-05-17). They indicate an active Cisco patch/exploitation cycle but are not part of CVE-2026-76460 and should not be conflated with it.
Discrepancy note. The primary item is titled and linked as an NVD record (nvd.nist.gov/vuln/detail/CVE-2026-76460), yet its body is formatted as a CISA KEV record ("Required action", "Due date", "Known ransomware campaign use"). We report the source's stated due date (2026-09-19) as-is but cannot confirm KEV listing without verified reference data.
4. Mitigation & containment
P1 — within 24 hours
- Inventory all Cisco ISE and ISE-PIC instances; identify which web management interfaces are reachable from untrusted networks. The source explicitly places responsibility on stakeholders to evaluate each asset's internet exposure.
- Apply Cisco's vendor-supplied mitigation/fix per Cisco's ISE security advisory (source: "Apply mitigations in accordance with vendor instructions"). The source's stated remediation due date is 2026-09-19.
- Restrict management-plane exposure: limit access to the ISE/ISE-PIC web management interface to trusted management networks or VPN; do not leave it internet-facing.
- Follow the CISA BOD 26-04 guidance referenced in the source.
P2 — within 72 hours
- If no mitigation is available, follow the applicable BOD 26-04 guidance for cloud services or discontinue use of the product (source).
- Review management-interface authentication and access logs for unauthorized access.
P3 — within 7 days
- Complete patching across all instances, re-verify external exposure, and review ISE hardening.
5. Indicators of compromise
No indicators of compromise available in the source material.
The sources describe a vulnerability mechanism, not observed attacker activity, and contain no atomic indicators (no hashes, domains, IPs, file paths or registry keys). One behavioural indicator can be derived from the described mechanism:
Behavioural indicators
| behaviour | where to observe | confidence |
|---|---|---|
| Access to the ISE/ISE-PIC web management interface without a preceding authentication event | ISE management-interface access/authentication logs; reverse-proxy or load-balancer logs fronting the admin UI | low — derived from the described mechanism; source gives no log format |
6. Detection
Insufficient indicators to author detection rules.
The sources contain no threat artefacts (no distinctive strings, command-line flags, mutexes, scheduled-task or service names, file paths, registry keys or hard-coded values). CVE identifiers and product names are not threat artefacts and are not emitted as detection content.
7. Sources
- NVD — CVE-2026-76460 — https://nvd.nist.gov/vuln/detail/CVE-2026-76460 — published 2026-09-15
- BSI Germany — [NEU] [hoch] Cisco ISE and Cisco ISE-PIC: Mehrere Schwachstellen — https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1989 — date not provided
- SecurityWeek — Critical Command Execution Vulnerability Patched in Cisco ISE — https://www.securityweek.com/critical-command-execution-vulnerability-patched-in-cisco-ise/ — date not provided
- BSI Germany — [NEU] [mittel] Cisco Identity Services Engine (ISE): Schwachstelle ermöglicht Manipulation von Dateien — https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2374 — date not provided
- CISA Known Exploited Vulnerabilities — CVE-2026-76461 — Cisco Secure Email Gateway SQL Injection — https://nvd.nist.gov/vuln/detail/CVE-2026-76461 — date not provided
- CISA Known Exploited Vulnerabilities — CVE-2026-20079 — Cisco Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Authentication Bypass — https://nvd.nist.gov/vuln/detail/CVE-2026-20079 — date not provided
- CISA Known Exploited Vulnerabilities — CVE-2026-20182 — Cisco Catalyst SD-WAN Controller Authentication Bypass — https://nvd.nist.gov/vuln/detail/CVE-2026-20182 — date not provided
8. Adverse Trace position
Adverse Trace assesses CVE-2026-76460 as a potentially high-impact authentication/authorization bypass in a security-critical identity and network access control platform, but we do not assign a severity: no verified reference data was resolved for this item and the source carries no CVSS score or severity rating. Client impact is concentrated where ISE/ISE-PIC management interfaces are internet-reachable — an unauthenticated remote bypass of the admin plane on a NAC/identity system is a serious exposure, and the source's KEV-style due date of 2026-09-19 implies urgency we cannot independently confirm. The adjacent ISE reporting (BSI, SecurityWeek) is single-sourced and describes different mechanisms; we do not treat it as confirmation of this CVE's impact. We will monitor for Cisco's advisory and any confirmed exploitation, and will update this advisory if verified reference data (CVSS, severity, KEV status) is resolved.
Published via PulseTrace — Adverse Trace threat intelligence.