Skip to content
Fencer Vulns
medium 5.3

CVE-2021-22764 json

A CWE-287: Improper Authentication vulnerability exists in PowerLogic PM55xx, PowerLogic PM8ECC, PowerLogic EGX100 and PowerLogic EGX300 (s…

published 2021-06-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9899

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

A CWE-287: Improper Authentication vulnerability exists in PowerLogic PM55xx, PowerLogic PM8ECC, PowerLogic EGX100 and PowerLogic EGX300 (see security notification for version infromation) that could cause loss of connectivity to the device via Modbus TCP protocol when an attacker sends a specially crafted HTTP request.

Patch / fix

  • schneider-electric powerlogic_pm5560_firmware 2.7.8
  • schneider-electric powerlogic_pm5561_firmware 10.7.3
  • schneider-electric powerlogic_pm5563_firmware 2.7.8

Vendor advisories

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

cisa ICSA-24-331-01 updated cvss 5.3

Schneider Electric PowerLogic PM55xx and PowerLogic PM8ECC

  • Schneider Electric PowerLogic PM5560 <2.7.8 Schneider Electric PowerLogic PM5561 <10.7.3
    affected: vendor fix se.com
  • Schneider Electric PowerLogic PM5562 <=2.5.4
    affected
  • Schneider Electric PowerLogic PM5563 <2.7.8
    affected: vendor fix se.com
  • Schneider Electric PowerLogic 5563 2.8.3 Schneider Electric PowerLogic PM5560 2.8.3 Schneider Electric PowerLogic PM5561 10.7.3
    fixed
  • Schneider Electric PowerLogic PM5562 <4.3.5
    fixed: vendor fix se.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

1.86% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a PowerLogic PM55xx, PowerLogic EGX100, and PowerLogic EGX300 (see security notification for version infromation)

Classification

Weakness

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.