How severe is CVE-2021-35245?

CVE-2021-35245 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-35245 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35245?

CVE-2021-35245 primarily affects Solarwinds Serv-u. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-35245?

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-2021-35245 published?

CVE-2021-35245 was published on 2021-12-06 and last updated on 2026-06-17.

CVE-2021-35245

CVE-2021-35245 is a high-severity vulnerability in Solarwinds Serv-u with a CVSS 3.x base score of 8.4. 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-284.

Key facts

Severity: High (CVSS 3.x base score 8.4)
CVSS v2: 6.8
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Solarwinds Serv-u
Published: 2021-12-06
Last modified: 2026-06-17

Description

When a user has admin rights in Serv-U Console, the user can move, create and delete any files are able to be accessed on the Serv-U host machine.

Frequently asked questions

What is CVE-2021-35245?: When a user has admin rights in Serv-U Console, the user can move, create and delete any files are able to be accessed on the Serv-U host machine.
How severe is CVE-2021-35245?: CVE-2021-35245 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-35245 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35245?: CVE-2021-35245 primarily affects Solarwinds Serv-u. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-35245?: 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-2021-35245 published?: CVE-2021-35245 was published on 2021-12-06 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:solarwinds:serv-u:*:*:*:*:*:*:*:*
cpe:2.3:a:solarwinds:serv-u:15.2.4:hotfix1:*:*:*:*:*:*
cpe:2.3:a:solarwinds:serv-u:15.2.5:-:*:*:*:*:*:*

More vulnerabilities in Solarwinds Serv-u

CVE-2020-35481 — Critical (CVSS 9.8): SolarWinds Serv-U before 15.2.2 allows Unauthenticated Macro Injection.
CVE-2025-40541 — Critical (CVSS 9.1): An Insecure Direct Object Reference (IDOR) vulnerability exists in Serv-U, which when exploited, gives a malicious…
CVE-2025-40540 — Critical (CVSS 9.1): A type confusion vulnerability exists in Serv-U which when exploited, gives a malicious actor the ability to execute…
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CVE-2025-40538 — Critical (CVSS 9.1): A broken access control vulnerability exists in Serv-U which when exploited, gives a malicious actor the ability to…
CVE-2025-40549 — Critical (CVSS 9.1): A Path Restriction Bypass vulnerability exists in Serv-U that when abused, could give a malicious actor with access to…

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