How severe is CVE-2021-21517?

CVE-2021-21517 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2021-21517 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21517?

CVE-2021-21517 primarily affects Dell Emc Srs Policy Manager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21517?

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-2021-21517 published?

CVE-2021-21517 was published on 2021-03-01 and last updated on 2026-06-17.

CVE-2021-21517

CVE-2021-21517 is a high-severity vulnerability in Dell Emc Srs Policy Manager with a CVSS 3.x base score of 7.2. 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-611.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.4
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Dell Emc Srs Policy Manager
Published: 2021-03-01
Last modified: 2026-06-17

Description

SRS Policy Manager 6.X is affected by an XML External Entity Injection (XXE) vulnerability due to a misconfigured XML parser that processes user-supplied DTD input without sufficient validation. A remote unauthenticated attacker can potentially exploit this vulnerability to read system files as a non-root user and may be able to temporarily disrupt the ESRS service.

Frequently asked questions

What is CVE-2021-21517?: SRS Policy Manager 6.X is affected by an XML External Entity Injection (XXE) vulnerability due to a misconfigured XML parser that processes user-supplied DTD input without sufficient validation. A remote unauthenticated attacker can potentially exploit this vulnerability to read system files as a non-root user and may be able to temporarily disrupt the ESRS service.
How severe is CVE-2021-21517?: CVE-2021-21517 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2021-21517 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21517?: CVE-2021-21517 primarily affects Dell Emc Srs Policy Manager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21517?: 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-2021-21517 published?: CVE-2021-21517 was published on 2021-03-01 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/en-us/000183576/dsa-2021-045-dell-emc-srs-policy-manager-security-update-for-external-entity-injection-vulnerability

Affected products (3)

cpe:2.3:a:dell:emc_srs_policy_manager:6.6:*:*:*:*:*:*:*
cpe:2.3:a:dell:emc_srs_policy_manager:6.8.3:*:*:*:*:*:*:*
cpe:2.3:a:dell:emc_srs_policy_manager:6.9.0:*:*:*:*:*:*:*

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CVE-2018-1000837 — Critical (CVSS 10.0): UML Designer version <= 8.0.0 contains a XML External Entity (XXE) vulnerability in XML parser for plugins that can…
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