CVE-2026-76413
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2026-76413 is a high-severity Improper Restriction of Security Token Assignment (CWE-1259) vulnerability in Cisco Adaptive Security (inferred from references). Its CVSS base score is 8.2 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Access Token Manipulation (T1134); ranked at the 25th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to AC-16 (Security and Privacy Attributes) and AC-25 (Reference Monitor) — see the control section below for these in your framework.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-81120
Vulnerability Data
A vulnerability in Cisco Adaptive Security Device Manager (ASDM) single sign-on (SSO) handler for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to log in as the Cisco ASDM administrator user. This vulnerability is due to improper management…
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of the Cisco ASDM SSO token. An attacker could exploit this vulnerability by performing session token forgery techniques. A successful exploit could allow the attacker to log in as the administrator user and, by repeating this action, keep legitimate administrators locked out of the ASDM indefinitely.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Security attributes (tokens) must be associated and maintained with subjects/objects, which structurally prevents improper assignment or lack of protection.
A tamperproof reference monitor ensures security tokens cannot be improperly assigned or altered outside policy.
Access enforcement directly requires that security tokens used for authorization decisions are protected from unauthorized assignment or modification.
Isolating security functions from non-security functions reduces the attack surface for tampering with token assignment logic.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Pre-acquisition hardware integrity checks can detect flawed token protection mechanisms before deployment.
Proper definition and enforcement of authorizations directly addresses improper security token restrictions.
Logical access protections can prevent exploitation of improperly assigned hardware security tokens.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Privileged access rights help ensure only authorized processes can assign or modify tokens.
Secure architecture principles can guide token protection mechanisms but do not enforce assignment rules.
Secure coding practices reduce the likelihood of token-assignment bugs but do not define the policy.
Security testing can detect improper token assignment but does not prevent it at design time.
Information access restriction directly limits which entities can obtain or use security tokens.