CVE-2021-1281

MEDIUMNVD 5.16.7▲
EchelonGraph scoreMEDIUM confidence

Score 6.7 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 5.1; sources differ by 1.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability in CLI management in Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to access the underlying operating system as the root user. This vulnerability is due to the way the software handles concurrent CLI sessions. An attacker could exploit this vulnerability by authenticating to the device as an administrative user and executing a sequence of commands. A successful exploit could allow the attacker to obtain access to the underlying operating system as the root user.

CVSS v3
5.1
EG Score
6.7(medium)
EG Risk
—
EPSS
19.6%
KEV
Not listed

Published

March 24, 2021

Last Modified

November 21, 2024

References (2)

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 22:42 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
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  68. 2026-05-26 19:13 UTCGHSA enrichment
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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-1281?
CVE-2021-1281 is a medium vulnerability published on March 24, 2021. A vulnerability in CLI management in Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to access the underlying operating system as the root user. This vulnerability is due to the way the software handles concurrent CLI sessions. An attacker could exploit this vulnerability…
When was CVE-2021-1281 disclosed?
CVE-2021-1281 was first published in the National Vulnerability Database on March 24, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-1281 actively exploited?
CVE-2021-1281 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-1281?
CVE-2021-1281 has a CVSS v3 base score of 5.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.7.
How do I remediate CVE-2021-1281?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-1281, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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