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Fencer Vulns
medium 6.5

CVE-2024-2103 json

Inclusion of Undocumented Features

published 2024-04-04 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-27067

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

Inclusion of undocumented features vulnerability accessible when logged on with a privileged access level on the following Schweitzer Engineering Laboratories relays could allow the relay to behave unpredictably: SEL-700BT Motor Bus Transfer Relay, SEL-700G Generator Protection Relay, SEL-710-5 Motor Protection Relay, SEL-751 Feeder Protection Relay, SEL-787-2/-3/-4 Transformer Protection Relay, SEL-787Z High-Impedance Differential Relay

. See product instruction manual appendix A dated 20240308 for more details regarding the SEL-751 Feeder Protection Relay. For more information for the other affected products, see their instruction manuals dated 20240329.

Patch / fix

  • Schweitzer Engineering Laboratories SEL-700BT Motor Bus Transfer Relay R301-V6, R302-V1
  • Schweitzer Engineering Laboratories SEL-700G Generator Protection Relay R301-V6, R302-V1
  • SEL-710-5 Motor Protection Relay SEL-710-5 Motor Protection Relay R302-V1
  • Schweitzer Engineering Laboratories SEL-751 Feeder Protection Relay R302-V3, R400-V2
  • Schweitzer Engineering Laboratories SEL-787-2/-3/-4 Transformer Protection Relay R302-V1
  • Schweitzer Engineering Laboratories SEL-787Z High-Impedance Differential Relay R302-V3

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-095-02 updated cvss 6.5

Schweitzer Engineering Laboratories SEL 700 series relays

  • Schweitzer Engineering Laboratories SEL-700BT Motor Bus Transfer Relay >=R301-V0, <R301-V6, >=R302-V0, <R302-V1 Schweitzer Engineering Laboratories SEL-700G Generator Protection Relay >=R100-V0, <R301-V6, >=R302-V0, <R302-V1 Schweitzer Engineering Laboratories SEL-710-5 Motor Protection Relay >=R100-V0, <R302-V1 Schweitzer Engineering Laboratories SEL-751 Feeder Protection Relay >=R101-V0, <R302-V3, >=R400-V0, <R400-V2 Schweitzer Engineering Laboratories SEL-787-2/-3/-4 Transformer Protection Relay >=R100-V0, <R302-V1 Schweitzer Engineering Laboratories SEL-787Z High-Impedance Differential Relay >=R302-V0, <R302-V3
    affected: vendor fix, mitigation “Schweitzer Engineering Laboratories recommends updating to the latest versions:” selinc.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

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

Affected products

  • Schweitzer Engineering Laboratories SEL-700BT Motor Bus Transfer Relay
  • Schweitzer Engineering Laboratories SEL-700G Generator Protection Relay
  • SEL-710-5 Motor Protection Relay SEL-710-5 Motor Protection Relay
  • Schweitzer Engineering Laboratories SEL-751 Feeder Protection Relay
  • Schweitzer Engineering Laboratories SEL-787-2/-3/-4 Transformer Protection Relay
  • Schweitzer Engineering Laboratories SEL-787Z High-Impedance Differential Relay

Classification

Weakness
  • CWE-1242 Inclusion of Undocumented Features or Chicken Bits

References

Sources

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.