CVE-2025-41770: Unauthenticated Denial of Service

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-12 · updated 2026-09-29
Weakness: CWE-770

Description

An unauthenticated denial-of-service vulnerability in the device's PLCnext Engineer communication interface allow an remote attacker to interrupt access via the client application. Successful exploitation prevents communication until the PLCnext service is manually restarted.

Affected products

PHOENIX CONTACT AXC F 1152: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact AXC F 1252: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact AXC F 2000 EA: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
PHOENIX CONTACT AXC F 2152: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
PHOENIX CONTACT AXC F 3152: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
PHOENIX CONTACT BPC 9102S: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact BPC 9202S: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact Catan C1: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact EPC 1502: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact EPC 1522: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact RFC 4072R: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
PHOENIX CONTACT RFC 4072S: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact VL3 UPC 2440 EDGE: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact VPLCNEXT CONTROL 1000: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact VPLCNEXT CONTROL 2000: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact VPLCNEXT CONTROL 3000: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3
Phoenix Contact VPLCNEXT CONTROL 500: from 2019.0.4 before 2026.0.3 — fixed in 2026.0.3

How to fix

Upgrade to a fixed version: PHOENIX CONTACT AXC F 1152 2026.0.3; Phoenix Contact AXC F 1252 2026.0.3; Phoenix Contact AXC F 2000 EA 2026.0.3; PHOENIX CONTACT AXC F 2152 2026.0.3; PHOENIX CONTACT AXC F 3152 2026.0.3; PHOENIX CONTACT BPC 9102S 2026.0.3; Phoenix Contact BPC 9202S 2026.0.3; Phoenix Contact Catan C1 2026.0.3; Phoenix Contact EPC 1502 2026.0.3; Phoenix Contact EPC 1522 2026.0.3; Phoenix Contact RFC 4072R 2026.0.3; PHOENIX CONTACT RFC 4072S 2026.0.3. Check the vendor advisory for mitigations.

References

https://phoenixcontact.csaf-tp.certvde.com/.well-known/csaf/white/2026/vde-2025-056.json

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