SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2019-10954

An attacker could send crafted SMTP packets to cause a denial-of-service condition where the controller enters a major non-recoverable faulted state (MNRF) in CompactLogix 5370 L1, L2, and L3 Controllers, Compact GuardLogix 5370 controllers, and Armor…

HIGH 7.5EPSS 6.10%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (6.10%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

An attacker could send crafted SMTP packets to cause a denial-of-service condition where the controller enters a major non-recoverable faulted state (MNRF) in CompactLogix 5370 L1, L2, and L3 Controllers, Compact GuardLogix 5370 controllers, and Armor Compact GuardLogix 5370 Controllers Versions 20 - 30 and earlier.

CVSS 3.1
7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
6.10% probability · 93th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-121, CWE-787
Affected
rockwellautomation/compactlogix 5370 l1 firmware · rockwellautomation/compactlogix 5370 l2 firmware · rockwellautomation/compactlogix 5370 l3 firmware · rockwellautomation/compact guardlogix 5370 firmware · rockwellautomation/armor compact guardlogix 5370 firmware
Source
ics-cert@hq.dhs.gov
EPSS trend
0%5%10%27 October 2026: 6.10%27 October 202627 October 2026

EPSS 6.1% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.