Cisco Integrated Services Router (ISR) 4351 and 4331 (with SM-ES3X-16-P, SM-ES3X-24-P, SM-D-ES3X-48-P, PVDM4-32, PVDM4-64, PVDM4-128 and PVDM4-256) and Cisco Integrated Services Router (ISR) 4321 (with PVDM4-32, PVDM4-64, PVDM4-128 and PVDM4-256)

Certificate

Module description

The Integrated Services Router (ISR) are routing platforms that provide comprehensive security services including VPN for small businesses, enterprise small branch and teleworkers. The platforms are architected to enable the next phase of branch-office evolution, providing rich media collaboration and virtualization to the branch while offering a wide-range of connectivity options.

Security level exceptions

• Roles, Services, and Authentication: Level 3
• Design Assurance: Level 3
• Mitigation of Other Attacks: N/A

Approved algorithms

Other algorithms

AES (non-compliant); DES; Diffie-Hellman (key establishment methodology provides between 112 and 150 bits of encryption strength; non-compliant less than 112 bits of encryption strength); EC Diffie-Hellman (key establishment methodology provides 128 or 192 bits of encryption strength); HMAC-MD5; MD5; NDRNG; RC4; RSA (key wrapping; key establishment methodology provides between 112 and 150 bits of encryption strength; non-compliant less than 112 bits of encryption strength); KBKDF (non-compliant);

Tested configurations

• N/A

Validation history

Status timeline

As observed by this tracker's snapshots. NIST publishes no dates for list moves; observation began 2026-08-21, so earlier changes carry no date.

• 2026-08-21: first observed by this tracker, status historical
• Validation dates on record: 2015-12-24

Source documents

• NIST certificate page
• Security policy (PDF)
• Consolidated certificate (PDF)