CVE-2023-34390 | Improper input validation could lead to denial of service

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.

Published: 2023-11-30 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-34390 is rated Low Risk (34.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.66%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-34390

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.26% 0.66% +0.40%
2 2025-03-30 0.38% 0.26% -0.12%
3 2025-03-29 — 0.38% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-34390

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.9 3.6 [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2023-34390

Affected software / configurations for CVE-2023-34390

Vendor Product Version Raw CPE
selinc sel-451_firmware >= r315-v0, < r315-v4 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware >= r316-v0, < r316-v4 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware >= r317-v0, < r317-v4 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware >= r318-v0, < r318-v5 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware >= r320-v0, < r320-v3 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware >= r321-v0, < r321-v3 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware >= r322-v0, < r322-v3 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware >= r323-v0, < r323-v5 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware >= r324-v0, < r324-v4 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware >= r325-v0, < r325-v3 cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
selinc sel-451_firmware r326-v0 cpe:2.3:o:selinc:sel-451_firmware:r326-v0:*:*:*:*:*:*:*
selinc sel-451_firmware r327-v0 cpe:2.3:o:selinc:sel-451_firmware:r327-v0:*:*:*:*:*:*:*

References for CVE-2023-34390

cvelogic Threat Intelligence