Improper input validation could lead to denial of service

published 2023-11-30 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-38470

cvss: 4.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Schweitzer Engineering Laboratories SEL-451 R315-V4, R316-V4, R317-V4, R318-V5, R320-V3, R321-V3, R322-V3, R323-V5, R324-V4, R325-V3, R326-V1, R327-V1

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.5	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Schweitzer Engineering Laboratories SEL-451

Classification

Weakness

CWE-20 Improper Input Validation

References

selinc.com /support/security-notifications/external-reports/
vendor-advisory
nozominetworks.com /blog/
third-party-advisory

Sources

CVE List CVE-2023-34390
NVD CVE-2023-34390

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Summary