Read the docs
TI-2021-01188 Aliases CVE-2021-1461GHSA-pv55-c55f-33qw

Cisco SD-WAN Software Signature Verification Bypass Vulnerability

Priority LOW 23CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-347.

Summary

A vulnerability in the Image Signature Verification feature of Cisco SD-WAN Software could allow an authenticated, remote attacker with Administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.Cisco has released software updates that address the vulnerability described in this advisory. There are no workarounds that address this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00409 35th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Catalyst SD-WAN Manager19.2.1; 18.4.4; 19.3.0; 19.2.2; 19.2.099; 18.3.6; 18.3.7; 19.2.0; 18.3.8; 19.0.0; 19.1.0; 18.4.302; 18.4.303; 19.2.097; 19.2.098; 17.2.10; 18.3.6.1; 19.0.1a; 18.2.0; 18.4.3; 18.4.1; 17.2.8; 18.3.3.1; 18.4.0; 18.3.1; 17.2.6; 17.2.9; 18.3.4; 17.2.5; 18.3.1.1; 18.3.5; 18.4.0.1; 18.3.3; 17.2.7; 17.2.4; 18.3.0; 19.2.3; 19.2.929; 19.2.31; 19.2.32; 19.2.4—No fix listedCNA
CiscoCisco SD-WAN vEdge Router18.4.303; 18.3.7; 19.3.0; 18.2.0; 19.2.099; 17.2.10; 18.3.3; 18.3.6; 19.0.0; 17.2.6; 18.4.0; 19.1.01; 19.2.098; 18.3.1; 18.4.302; 19.2.2; 18.3.5; 17.2.9; 19.1.0; 19.2.097; 17.2.5; 17.2.8; 18.3.8; 18.3.0; 18.4.3; 18.4.4; 19.2.1; 17.2.4; 18.3.4; 19.0.1a; 17.2.7; 18.4.1; 19.2.0; 19.2.3; 19.2.929; 19.2.31; 19.2.32; 19.2.4—No fix listedCNA
  • Cisco Catalyst SD-WAN Manager VendorCisco Affected 19.2.1; 18.4.4; 19.3.0; 19.2.2; 19.2.099; 18.3.6; 18.3.7; 19.2.0; 18.3.8; 19.0.0; 19.1.0; 18.4.302; 18.4.303; 19.2.097; 19.2.098; 17.2.10; 18.3.6.1; 19.0.1a; 18.2.0; 18.4.3; 18.4.1; 17.2.8; 18.3.3.1; 18.4.0; 18.3.1; 17.2.6; 17.2.9; 18.3.4; 17.2.5; 18.3.1.1; 18.3.5; 18.4.0.1; 18.3.3; 17.2.7; 17.2.4; 18.3.0; 19.2.3; 19.2.929; 19.2.31; 19.2.32; 19.2.4 Fixed in — No fix listed CNA
  • Cisco SD-WAN vEdge Router VendorCisco Affected 18.4.303; 18.3.7; 19.3.0; 18.2.0; 19.2.099; 17.2.10; 18.3.3; 18.3.6; 19.0.0; 17.2.6; 18.4.0; 19.1.01; 19.2.098; 18.3.1; 18.4.302; 19.2.2; 18.3.5; 17.2.9; 19.1.0; 19.2.097; 17.2.5; 17.2.8; 18.3.8; 18.3.0; 18.4.3; 18.4.4; 19.2.1; 17.2.4; 18.3.4; 19.0.1a; 17.2.7; 18.4.1; 19.2.0; 19.2.3; 19.2.929; 19.2.31; 19.2.32; 19.2.4 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*——Cisco
  • cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* Versions — — ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1461
  2. 2026-10-03 Alias added: GHSA-pv55-c55f-33qw

References

Other 2

  • TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53490 Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53488 Cisco Identity Services Engine Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-16388 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
See all 7059 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences