NVD / CVE Program· CNA CERTVDE

CVE-2025-41769: Unauthenticated Buffer Overflow in PROFINET Service

Noroxi assessment

Priority: Monitor (action score 37/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.83% (FIRST EPSS); higher than 57.5% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: Phoenix Contact AXC F 1152 2026.0.3; Phoenix Contact AXC F 1252 2026.0.3; Phoenix Contact AXC F 2152 2026.0.3.

Low priority for now. Upgrade to Phoenix Contact AXC F 1152 2026.0.3; Phoenix Contact AXC F 1252 2026.0.3; Phoenix Contact AXC F 2152 2026.0.3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The device's PROFINET service is affected by a buffer overflow vulnerability that exists in the default configuration. An unauthenticated remote attacker could exploit this vulnerability to reboot the device or execute arbitrary code.

CriticalCVSS 9.3 · v4.0—No exploit Fix available

Published: Aug 12, 2026
Updated: Sep 29, 2026
EPSS: 0.8% · 57th percentile
CWE: CWE-120

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 37 / 40 · 9.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.8%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · CERTVDE: 9.3; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (CERTVDE). Independent of NVD's CPE analysis and usually ahead of it.

Phoenix Contact AXC F 1152
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact AXC F 1252
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact AXC F 2152
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact AXC F 3152
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact BPC 9102S
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact BPC 9202S
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact EPC 1502
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact EPC 1522
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact RFC 4072R
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact RFC 4072S
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact VL3 UPC 2440 EDGE
- 2019.0.4 and later · before 2026.0.3affected · semver
Phoenix Contact VPLCNEXT CONTROL 1000
- 2019.0.4 and later · before 2026.0.3affected · semver

Same product

phoenix contact: all records

Other highest-scoring records for the same primary product.

CVE-2025-41668Phoenix Contact: File access due to the replacement of a critical file used by the service security-profile
35Monitor
CVE-2025-41667Phoenix Contact: File access due to the replacement of a critical file used by the arp-preinit script
35Monitor
CVE-2025-41666Phoenix Contact: File access due to the replacement of a critical file used by the watchdog
35Monitor

Published before and after this one in the same product

← EarlierCVE-2025-41669May 27, 2026 · Insufficient Verification of Data Authenticity
34Monitor
← EarlierCVE-2025-41670May 27, 2026 · Untrusted Search Path
34Monitor
Later →CVE-2025-41770Aug 12, 2026 · Unauthenticated Denial of Service
34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Phoenix Contact AXC F 1152	2026.0.3	Vendor (CNA)
Phoenix Contact AXC F 1252	2026.0.3	Vendor (CNA)
Phoenix Contact AXC F 2152	2026.0.3	Vendor (CNA)
Phoenix Contact AXC F 3152	2026.0.3	Vendor (CNA)
Phoenix Contact BPC 9102S	2026.0.3	Vendor (CNA)
Phoenix Contact BPC 9202S	2026.0.3	Vendor (CNA)
Phoenix Contact EPC 1502	2026.0.3	Vendor (CNA)
Phoenix Contact EPC 1522	2026.0.3	Vendor (CNA)
Phoenix Contact RFC 4072R	2026.0.3	Vendor (CNA)
Phoenix Contact RFC 4072S	2026.0.3	Vendor (CNA)
Phoenix Contact VL3 UPC 2440 EDGE	2026.0.3	Vendor (CNA)
Phoenix Contact VPLCNEXT CONTROL 1000	2026.0.3	Vendor (CNA)
Phoenix Contact VPLCNEXT CONTROL 2000	2026.0.3	Vendor (CNA)
Phoenix Contact VPLCNEXT CONTROL 3000	2026.0.3	Vendor (CNA)
Phoenix Contact VPLCNEXT CONTROL 500	2026.0.3	Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

CyberDanubefinder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1char buf[256];
2memcpy(buf, pkt->data, pkt->len);

Fixed

1char buf[256];
2if (pkt->len > sizeof(buf)) {
3  return -EINVAL;
4}
5memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

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Change log

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

For records you follow, these changes also arrive as notifications. →

References

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

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records