CVE-2021-1234

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2024-11-18. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.3Exploit: NoneExposed: 0

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

A vulnerability in the cluster management interface of Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. To be affected by this vulnerability, the vManage software must be in cluster mode. This vulnerability is due to the absence of authentication for sensitive information in the cluster management interface. An attacker could exploit this vulnerability by sending a crafted request to the cluster management interface of an affected system. A successful exploit could allow the attacker to view sensitive information on the affected system.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
—
EPSS
51.6%
KEV
Not listed

Published

November 18, 2024

Last Modified

August 4, 2025

References (1)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 44× 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
  3. 2026-07-21 15:22 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-20 17:04 UTCEPSS rescore
  6. 2026-07-19 14:28 UTCEPSS rescore
  7. 2026-07-19 02:26 UTCEPSS rescore
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  1. 2026-07-05 02:28 UTCEPSS rescore
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  5. 2026-07-02 16:57 UTCEPSS rescore
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  7. 2026-06-30 23:20 UTCEPSS rescore
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  24. 2026-06-21 01:58 UTCEPSS rescore
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  26. 2026-06-19 19:24 UTCEPSS rescore
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  28. 2026-06-18 17:51 UTCEPSS rescore
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  37. 2026-06-11 13:58 UTCEPSS rescore
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  40. 2026-06-10 13:20 UTCEPSS rescore
  41. 2026-06-08 14:15 UTCEPSS rescore
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  43. 2026-06-07 15:23 UTCEPSS rescore
  44. 2026-06-07 15:23 UTCEPSS rescore
  45. 2026-06-06 13:46 UTCEPSS rescore
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  48. 2026-06-05 22:45 UTCEPSS rescore
  49. 2026-06-05 22:45 UTCEPSS rescore
  50. 2026-06-05 06:09 UTCEPSS rescore
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  54. 2026-06-02 20:11 UTCEPSS rescore
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  56. 2026-06-01 13:50 UTCEPSS rescore
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  58. 2026-05-31 22:29 UTCEPSS rescore
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  60. 2026-05-31 00:15 UTCEPSS rescore
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  62. 2026-05-29 13:42 UTCEPSS rescore
  63. 2026-05-28 13:43 UTCEPSS rescore
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  65. 2026-05-27 13:39 UTCEPSS rescore
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  68. 2026-05-26 07:17 UTCEPSS rescore
  69. 2026-05-26 07:17 UTCEPSS rescore
  70. 2026-05-24 16:49 UTCEPSS rescore
  71. 2026-05-23 18:01 UTCEG score recompute
  72. 2026-05-23 18:01 UTCGHSA enrichment
  73. 2026-05-23 16:35 UTCOSV refresh

Frequently asked(5)

What is CVE-2021-1234?
CVE-2021-1234 is a medium vulnerability published on November 18, 2024. A vulnerability in the cluster management interface of Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. To be affected by this vulnerability, the vManage software must be in cluster mode. This vulnerability is…
When was CVE-2021-1234 disclosed?
CVE-2021-1234 was first published in the National Vulnerability Database on November 18, 2024, with the most recent update on August 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-1234 actively exploited?
CVE-2021-1234 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-1234?
CVE-2021-1234 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2021-1234?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-1234, 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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