How severe is CVE-2021-30642?

CVE-2021-30642 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-30642 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30642?

CVE-2021-30642 affects Symantec Security Analytics. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-30642?

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

When was CVE-2021-30642 published?

CVE-2021-30642 was published on 2021-04-27 and last updated on 2026-06-17.

CVE-2021-30642

CVE-2021-30642 is a critical-severity vulnerability in Symantec Security Analytics with a CVSS 3.x base score of 9.8. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Symantec Security Analytics
Published: 2021-04-27
Last modified: 2026-06-17

Description

An input validation flaw in the Symantec Security Analytics web UI 7.2 prior 7.2.7, 8.1, prior to 8.1.3-NSR3, 8.2, prior to 8.2.1-NSR2 or 8.2.2 allows a remote, unauthenticated attacker to execute arbitrary OS commands on the target with elevated privileges.

Frequently asked questions

What is CVE-2021-30642?: An input validation flaw in the Symantec Security Analytics web UI 7.2 prior 7.2.7, 8.1, prior to 8.1.3-NSR3, 8.2, prior to 8.2.1-NSR2 or 8.2.2 allows a remote, unauthenticated attacker to execute arbitrary OS commands on the target with elevated privileges.
How severe is CVE-2021-30642?: CVE-2021-30642 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-30642 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30642?: CVE-2021-30642 affects Symantec Security Analytics. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-30642?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-30642 published?: CVE-2021-30642 was published on 2021-04-27 and last updated on 2026-06-17.

References

https://support.broadcom.com/security-advisory/content/security-advisories/0/SYMSA17969

Affected products (1)

cpe:2.3:a:symantec:security_analytics:*:*:*:*:*:*:*:*

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