CVE-2021-35252

HIGHNVD 7.57.5—

7.5

Common encryption key appears to be used across all deployed instances of Serv-U FTP Server. Because of this an encrypted value that is exposed to an attacker can be simply recovered to plaintext.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 52.6%
KEV: Not listed

Published

December 16, 2022

Last Modified

November 21, 2024

References (6)

psirt@solarwindshttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35252
psirt@solarwindshttps://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3-2_release_notes.htm
psirt@solarwindshttps://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35252
af854a3a-2127-422b-91ae-364da2661108https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35252
af854a3a-2127-422b-91ae-364da2661108https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3-2_release_notes.htm
af854a3a-2127-422b-91ae-364da2661108https://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35252

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
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2026-05-25 10:28 UTCEG score recompute

Frequently asked(5)

What is CVE-2021-35252?

CVE-2021-35252 is a high vulnerability published on December 16, 2022. Common encryption key appears to be used across all deployed instances of Serv-U FTP Server. Because of this an encrypted value that is exposed to an attacker can be simply recovered to plaintext.

When was CVE-2021-35252 disclosed?

CVE-2021-35252 was first published in the National Vulnerability Database on December 16, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-35252 actively exploited?

CVE-2021-35252 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 52.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-35252?

CVE-2021-35252 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-35252?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-35252, 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.

Dependency Blast Radius

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CVE-2021-35252

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-35252?

🔗 Related CVEs(same CWE)

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Published

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References (6)

Frequently asked(5)

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