How severe is CVE-2021-36309?

CVE-2021-36309 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-36309 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36309?

CVE-2021-36309 affects Dell Enterprise Sonic Os. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36309?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-36309 published?

CVE-2021-36309 was published on 2021-10-01 and last updated on 2026-06-17.

CVE-2021-36309

CVE-2021-36309 is a high-severity vulnerability in Dell Enterprise Sonic Os with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v2: 4.0
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Dell Enterprise Sonic Os
Published: 2021-10-01
Last modified: 2026-06-17

Description

Dell Enterprise SONiC OS, versions 3.3.0 and earlier, contains a sensitive information disclosure vulnerability. An authenticated malicious user with access to the system may use the TACACS\Radius credentials stored to read sensitive information and use it in further attacks.

Frequently asked questions

What is CVE-2021-36309?: Dell Enterprise SONiC OS, versions 3.3.0 and earlier, contains a sensitive information disclosure vulnerability. An authenticated malicious user with access to the system may use the TACACS\Radius credentials stored to read sensitive information and use it in further attacks.
How severe is CVE-2021-36309?: CVE-2021-36309 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-36309 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36309?: CVE-2021-36309 affects Dell Enterprise Sonic Os. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36309?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-36309 published?: CVE-2021-36309 was published on 2021-10-01 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/en-us/000191690/DSA-2021-190-Dell-Enterprise-SONiC-OS-Security-Update-for-an-information-disclosure-Vulnerability

Affected products (1)

cpe:2.3:o:dell:enterprise_sonic_os:*:*:*:*:*:*:*:*

More vulnerabilities in Dell Enterprise Sonic Os

CVE-2025-38741 — High (CVSS 7.5): Dell Enterprise SONiC OS, version 4.5.0, contains a cryptographic key vulnerability in SSH. An unauthenticated remote…

All CVEs affecting Dell Enterprise Sonic Os →

Other CWE-522 (Insufficiently Protected Credentials) vulnerabilities

CVE-2026-7312 — Critical (CVSS 10.0): CWE‑522: Insufficiently Protected Credentials in web services in Progress Sitefinity version from 14.0.7700 to…
CVE-2026-29128 — Critical (CVSS 10.0): IDC SFX2100 Satellite Receiver firmware ships with multiple daemon configuration files for routing components (e.g.,…
CVE-2025-54863 — Critical (CVSS 10.0): Radiometrics VizAir is vulnerable to exposure of the system's REST API key through a publicly accessible configuration…
CVE-2024-12799 — Critical (CVSS 10.0): Insufficiently Protected Credentials vulnerability in OpenText Identity Manager Advanced Edition on Windows, Linux, 64…
CVE-2024-51545 — Critical (CVSS 10.0): Username Enumeration vulnerabilities allow access to application level username add, delete, modify and list…
CVE-2023-1778 — Critical (CVSS 10.0): This vulnerability exists in GajShield Data Security Firewall firmware versions prior to v4.28 (except v4.21) due to…

Browse all CWE-522 (Insufficiently Protected Credentials) vulnerabilities →