How severe is CVE-2021-3552?

CVE-2021-3552 has a CVSS 3.x base score of 5.3, rated medium 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 none.

Is CVE-2021-3552 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-2021-3552?

CVE-2021-3552 primarily affects Bitdefender Endpoint Security Tools. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3552?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-3552 published?

CVE-2021-3552 was published on 2021-11-24 and last updated on 2026-06-17.

CVE-2021-3552

CVE-2021-3552 is a medium-severity vulnerability in Bitdefender Endpoint Security Tools with a CVSS 3.x base score of 5.3. 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-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Bitdefender Endpoint Security Tools
Published: 2021-11-24
Last modified: 2026-06-17

Description

A Server-Side Request Forgery (SSRF) vulnerability in the EPPUpdateService component of Bitdefender Endpoint Security Tools allows an attacker to proxy requests to the relay server. This issue affects: Bitdefender Endpoint Security Tools versions prior to 6.6.27.390; versions prior to 7.1.2.33. Bitdefender GravityZone 6.24.1-1.

Frequently asked questions

What is CVE-2021-3552?: A Server-Side Request Forgery (SSRF) vulnerability in the EPPUpdateService component of Bitdefender Endpoint Security Tools allows an attacker to proxy requests to the relay server. This issue affects: Bitdefender Endpoint Security Tools versions prior to 6.6.27.390; versions prior to 7.1.2.33. Bitdefender GravityZone 6.24.1-1.
How severe is CVE-2021-3552?: CVE-2021-3552 has a CVSS 3.x base score of 5.3, rated medium 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 none.
Is CVE-2021-3552 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-2021-3552?: CVE-2021-3552 primarily affects Bitdefender Endpoint Security Tools. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3552?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3552 published?: CVE-2021-3552 was published on 2021-11-24 and last updated on 2026-06-17.

References

https://www.bitdefender.com/support/security-advisories/insufficient-validation-regular-expression-eppupdateservice-config-file-va-9825

Affected products (3)

cpe:2.3:a:bitdefender:endpoint_security_tools:*:*:*:*:*:-:*:*
cpe:2.3:a:bitdefender:endpoint_security_tools:*:*:*:*:*:*:*:*
cpe:2.3:a:bitdefender:gravityzone:6.24.1-1:*:*:*:*:*:*:*

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