CVE Intelligence
High Denial of service

CVE-2025-41770 — Unauthenticated Denial of Service

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.

Published Aug 12, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: CERTVDE

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.5% (30-day exploitation probability)+7
  • Technical severity (high)+6
  • Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.55%
ahead of 45% of scored CVEs · Oct 15, 2026
Affects
Phoenix Contact
AXC F 1152 and 16 more
CVSS base
7.5
High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
Yes
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Phoenix Contact AXC F 1152, Phoenix Contact AXC F 1252, Phoenix Contact AXC F 2000 EA…).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  4. Search available logs for exploit probes matching the vulnerability class (denial of service), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Phoenix Contact AXC F 1152 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact AXC F 1252 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact AXC F 2000 EA ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact AXC F 2152 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact AXC F 3152 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact BPC 9102S ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact BPC 9202S ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact Catan C1 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact EPC 1502 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact EPC 1522 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact RFC 4072R ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact RFC 4072S ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact VL3 UPC 2440 EDGE ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact VPLCNEXT CONTROL 1000 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact VPLCNEXT CONTROL 2000 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact VPLCNEXT CONTROL 3000 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP
Phoenix Contact VPLCNEXT CONTROL 500 ≥ 2019.0.4 and < 2026.0.3 Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
8.7 CVSS 4.0 High — — info@cert.vde.com via NIST National Vulnerability Database
8.7 CVSS 4.0 High — — CERTVDE via CVE Program (cve.org) e CISA ADP
7.5 CVSS 3.1 High 3.9 3.6 info@cert.vde.com via NIST National Vulnerability Database
7.5 CVSS 3.1 High — — CERTVDE via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (score shown at the top: info@cert.vde.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-770 · Allocation of Resources Without Limits or Throttling

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Track CPU/memory spikes and availability drops correlated with request patterns.
web/proxy/WAF logsnetwork IDS/IPSresource metrics

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · phoenix contact/axc f 1152, phoenix contact/axc f 1252, phoenix contact/axc f 2000 ea, phoenix contact/axc f 2152, phoen
    Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 15, 2026
  • CVSS changed · 7.5
    Oct 15, 2026 · NIST National Vulnerability Database
  • Source status changed · → Deferred
    Oct 15, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 15, 2026 · NIST National Vulnerability Database
  • CVE published
    Aug 12, 2026 · CERTVDE

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

1 on the record

Elsewhere on this site

Phoenix Contact
every CVE for this vendor
Denial of service
same class
CWE-770
other pages naming this weakness

Related CVEs (same products)

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-41770 is "Unauthenticated Denial of Service", rated High. It affects AXC F 1152 (Phoenix Contact); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.5 describes technical severity. EPSS 0.55% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.

Sign in or create an account to comment and suggest corrections.