How severe is CVE-2023-34390?

CVE-2023-34390 has a CVSS 3.x base score of 4.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-34390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34390?

CVE-2023-34390 primarily affects Selinc Sel-451 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-34390?

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

When was CVE-2023-34390 published?

CVE-2023-34390 was published on 2023-11-30 and last updated on 2026-06-17.

CVE-2023-34390

CVE-2023-34390 is a medium-severity vulnerability in Selinc Sel-451 Firmware with a CVSS 3.x base score of 4.5. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 4.5)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Selinc Sel-451 Firmware
Published: 2023-11-30
Last modified: 2026-06-17

Description

An input validation vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow a remote authenticated attacker to create a denial of service against the system and locking out services. See product Instruction Manual Appendix A dated 20230830 for more details.

Frequently asked questions

What is CVE-2023-34390?: An input validation vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow a remote authenticated attacker to create a denial of service against the system and locking out services. See product Instruction Manual Appendix A dated 20230830 for more details.
How severe is CVE-2023-34390?: CVE-2023-34390 has a CVSS 3.x base score of 4.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-34390 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34390?: CVE-2023-34390 primarily affects Selinc Sel-451 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-34390?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-34390 published?: CVE-2023-34390 was published on 2023-11-30 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:selinc:sel-451_firmware:r326-v0:*:*:*:*:*:*:*
cpe:2.3:o:selinc:sel-451_firmware:r327-v0:*:*:*:*:*:*:*

More vulnerabilities in Selinc Sel-451 Firmware

CVE-2023-31176 — High (CVSS 7.5): An Insufficient Entropy vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow an unauthenticated…
CVE-2023-34388 — Medium (CVSS 6.5): An Improper Authentication vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow a remote…
CVE-2023-34389 — Medium (CVSS 4.5): An allocation of resources without limits or throttling vulnerability in the Schweitzer Engineering Laboratories…
CVE-2023-31177 — Medium (CVSS 4.3): An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in the Schweitzer Engineering…

All CVEs affecting Selinc Sel-451 Firmware →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →