Is CVE-2021-1479 actively exploited?

No active exploitation of CVE-2021-1479 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-1479 be exploited remotely?

Yes. CVE-2021-1479 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-1479?

CVE-2021-1479 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-1479

CWE-119Published: April 8, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Multiple vulnerabilities in Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to execute arbitrary code or allow an authenticated, local attacker to gain escalated privileges on an affected system. For more information about these vulnerabilities, see the Details section of this advisory.

NVD Source

Technical Analysis

CVE-2021-1479 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.