Authentication Bypass Using an Alternate Path or Channel

published 2023-05-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-35468

cvss: 4.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits: 0; none known

An Authentication Bypass Using an Alternate Path or Channel vulnerability in the Schweitzer Engineering Laboratories Real-Time Automation Controller (SEL RTAC) Web Interface allows Authentication Bypass. See SEL Service Bulletin dated 2022-11-15 for more details.

Patch / fix

fixed in 10

Schweitzer Engineering Laboratories SEL-3505 R147-V6, R148-V7, R149-V4, R150-V2
Schweitzer Engineering Laboratories SEL-3505-3 R147-V6, R148-V7, R149-V4, R150-V2
Schweitzer Engineering Laboratories SEL-3530 R147-V6, R148-V7, R149-V4, R150-V2
Schweitzer Engineering Laboratories SEL-3530-4 R147-V6, R148-V7, R149-V4, R150-V2
Schweitzer Engineering Laboratories SEL-3532 R147-V6, R148-V7, R149-V4, R150-V2
Schweitzer Engineering Laboratories SEL-3555 R147-V6, R148-V7, R149-V4, R150-V2
Schweitzer Engineering Laboratories SEL-3560S R147-V6, R148-V7, R149-V4, R150-V2
Schweitzer Engineering Laboratories SEL-3560E R147-V6, R148-V7, R149-V4, R150-V2
Schweitzer Engineering Laboratories SEL-2241 RTAC module R147-V6, R148-V7, R149-V4, R150-V2
Schweitzer Engineering Laboratories SEL-3350 R148-V7, R149-V4, R150-V2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 21 mo ago (2025-01-24)

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.0	CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Schweitzer Engineering Laboratories SEL-3505
Schweitzer Engineering Laboratories SEL-3505-3
Schweitzer Engineering Laboratories SEL-3530
Schweitzer Engineering Laboratories SEL-3530-4
Schweitzer Engineering Laboratories SEL-3532
Schweitzer Engineering Laboratories SEL-3555
Schweitzer Engineering Laboratories SEL-3560S
Schweitzer Engineering Laboratories SEL-3560E
Schweitzer Engineering Laboratories SEL-2241 RTAC module
Schweitzer Engineering Laboratories SEL-3350

Classification

Weakness

CWE-288 Authentication Bypass Using an Alternate Path or Channel
CWE-287 Improper Authentication

References

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

Sources

CVE List CVE-2023-31152
NVD CVE-2023-31152

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary