Vulnerabilities and exposures for PLCnext Control AXC F 2152

The following sections list the security vulnerabilities (CVEs) that have been resolved in the respective firmware release. For more information about the specified CVE numbers, see:

Information on the Phoenix Contact PSIRT can be found at https://www.phoenixcontact.com/psirt.

Firmware releases 2026.x

2026.62026.6

Released on 2026-07-24 - updated 2026-07-31

Attr

  • CVE-2026-54371

Curl

  • CVE-2026-8286
  • CVE-2026-8458
  • CVE-2026-8924
  • CVE-2026-8926
  • CVE-2026-8927
  • CVE-2026-8932
  • CVE-2026-9079
  • CVE-2026-9545
  • CVE-2026-9547
  • CVE-2026-10536
  • CVE-2026-11856
  • CVE-2026-12064

Expat

  • CVE-2026-50219
  • CVE-2026-56131
  • CVE-2026-56403
  • CVE-2026-56404
  • CVE-2026-56405
  • CVE-2026-56406
  • CVE-2026-56407
  • CVE-2026-56408
  • CVE-2026-56409
  • CVE-2026-56410
  • CVE-2026-56411
  • CVE-2026-56412

Freetype

  • CVE-2026-23865

Glibc

  • CVE-2026-5450
  • CVE-2026-5928

IEC 61131-3

The integrity check of a PLCnext Engineer project has been
improved.

Libcap

  • CVE-2026-4878

Libgcrypt

  • CVE-2026-41989

Libpng

  • CVE-2026-34757

Libssh

  • CVE-2026-0964
  • CVE-2026-0965
  • CVE-2026-0966
  • CVE-2026-0967
  • CVE-2026-0968

Libssh2

  • CVE-2026-7598
  • CVE-2026-15661
  • CVE-2026-55199
  • CVE-2026-55200
  • CVE-2026-58050

Libusb

  • CVE-2026-23679
  • CVE-2026-47104

Libxml

  • CVE-2026-0989 Updated on 2026-07-31
  • CVE-2026-0990 Updated on 2026-07-31
  • CVE-2026-0992 Updated on 2026-07-31

Ncurses

  • CVE-2026-67920

Nfs-utils

  • CVE-2026-12801

OpenSSH

  • CVE2026-59995
  • CVE2026-59996
  • CVE2026-59997
  • CVE2026-59998
  • CVE2026-59999
  • CVE2026-60000
  • CVE2026-60001
  • CVE2026-60002

OpenSSL

A denial-of-service (DoS) vulnerability in former OpenSSL
versions allowed a remote, unauthenticated attacker to
trigger excessive memory allocation by sending a specially
crafted TLS handshake message of only 11 bytes
(HollowByte).

Python

  • CVE-2026-4519

Python pip

  • CVE-2026-1703

Rauc

  • CVE-2026-34155

Sudo

  • CVE-2026-35535

Systemd

  • CVE-2026-29111
  • CVE-2026-40225

Tar

  • CVE-2026-5704

U-boot

  • CVE-2026-57256

Util-linux-mount

  • CVE-2026-27456

Xz

  • CVE-2026-34643

Zlib

  • CVE-2026-27171

2026.0.5 LTS2026.0.5 LTS

Released on 2026-07-10

Gnutls

  • CVE-2026-42009

OpenSSL

  • CVE-2026-34182 
  • CVE-2026-7383 
  • CVE-2026-9076 
  • CVE-2026-34180 
  • CVE-2026-45445 
  • CVE-2026-42766 
  • CVE-2026-42767 
  • CVE-2026-45446 
  • CVE-2026-42770 
  • CVE-2026-45447

Nginx

  • CVE-2026-1642 
  • CVE-2026-9256

2026.0.4 LTS2026.0.4 LTS

 Released on 2026-06-01  

Backup & Restore

  • During decryption of an encrypted backup, a WBM alert containing internal security-related information was triggered when a user entered an incorrect password.
  • During backup creation it was possible to set an encryption password with the length of one character.

Curl

  • CVE-2026-1965 
  • CVE-2026-3783 
  • CVE-2026-3784
  • CVE-2026-4873 
  • CVE-2026-5545 
  • CVE-2026-5773 
  • CVE-2026-6253 
  • CVE-2026-6276 
  • CVE-2026-6429 
  • CVE-2026-7168

Expat

  • CVE-2026-45186

Gnutls

  • CVE-2026-3832
  • CVE-2026-3833 
  • CVE-2026-33845
  • CVE-2026-42010

Kernel

  • CVE-2026-43186
  • CVE-2026-46300

Libexpat

  • CVE-2026-32776
  • CVE-2026-32777
  • CVE-2026-32778
  • CVE-2026-41080

Openssh

Support of the obsolete “+ssh-rsa” algorithm has now been removed. In order to maintain compatibility with older clients, the algorithm was explicitly reactivated in previous updates, despite being communicated as removed.

Rsync

  • CVE-2026-29518
  • CVE-2026-41035
  • CVE-2026-43617
  • CVE-2026-43618
  • CVE-2026-43619
  • CVE-2026-43620
  • CVE-2026-45232

2026.0.3 LTS2026.0.3 LTS

 Released on 2026-05-21 - updated 2026-05-27

ACF

  • CVE-2025-41670 Updated on 2026-05-27

Glibc

  • CVE-2026-4438 
  • CVE-2026-4437 
  • CVE-2026-4046 

Kernel

  • CVE-2026-31431
  • CVE-2026-43037
  • CVE-2026-43038
  • CVE-2026-43284

Libssh

  • CVE-2025-5987 
  • CVE-2026-3731

Nghttp2

  • CVE-2026-27135

NTP

Via web-based management service any parameters for the NTP/chrony configuration could be written to the configuration file and applied accordingly.

Openssh

  • CVE-2026-35386 
  • CVE-2026-35385 
  • CVE-2026-35414 
  • CVE-2026-35387 
  • CVE-2026-35388 

Openssl

  • CVE-2026-31790 
  • CVE-2026-28390 
  • CVE-2026-28389 
  • CVE-2026-28388 
  • CVE-2026-28387 
  • CVE-2026-31789 

Python

  • CVE-2025-13837
  • CVE-2025-12084
  • CVE-2025-13836

2026.0.2 LTS2026.0.2 LTS

Released on 2026-04-16 

Backup and Restore

  • The certificates from the Identity Store were not saved within a backup file.
  • Restoring a manipulated backup file led to an exception and system watchdog.

Curl

  • CVE-2025-14017 
  • CVE-2025-0167 
  • CVE-2025-5025
  • CVE-2025-15079
  • CVE-2025-14819 
  • CVE-2025-14524 
  • CVE-2025-10148 
  • CVE-2025-15224

DPKG

  • CVE-2025-6297

Git

  • CVE-2025-48384

Glib

  • CVE-2025-14512 
  • CVE-2025-13601 
  • CVE-2025-14087 
  • CVE-2025-3360 
  • CVE-2025-4373 
  • CVE-2025-7039 
  • CVE-2025-6052

Glibc

CVE-2025-15281 
CVE-2026-0861 
CVE-2026-0915 
CVE-2025-8058 
CVE-2025-5702

Gnutls

CVE-2025-32989 
CVE-2025-32988 
CVE-2025-32990 
CVE-2025-6395 
CVE-2025-32988

GRPC

CVE-2024-11407 
CVE-2024-7246

Libxpat

CVE-2026-24515 
CVE-2025-59375

Libssh

CVE-2025-8114 
CVE-2025-5351

Libtasn

  • CVE-2025-13151

Libxml

  • CVE-2025-7425

Ncurses

  • CVE-2025-6141

Nginx

  • CVE-2025-23419 
  • CVE-2025-53859

Openssh

  • CVE-2025-61985 
  • CVE-2025-61984 
  • CVE-2025-32728

Openssl

  • CVE-2026-22796 
  • CVE-2026-22795 
  • CVE-2025-69421 
  • CVE-2025-69420 
  • CVE-2025-69419 
  • CVE-2025-69418 
  • CVE-2025-68160 
  • CVE-2025-15467 
  • CVE-2025-9230 
  • CVE-2025-9232

OpenVPN

  • CVE-2025-13086

PROFINET

  • A malformed LLDP frame could cause a crash (stack overflow) and potential code execution.

Rapidjson

  • CVE-2024-39684

RSC

  • A manipulated message interrupted the RSC communication to the PLCnext Engineer. In addition, the internal CPU system load increased up to 100 %.
  • Calls to internal RSC services without SecurityStub were allowed if the providing component was running in another process than the RscGateway.

Rsync

  • CVE-2025-10158

System

  • CVE-2025-41669
  • By activating the remote gRPC server, it was possible to use every available endpoint without authentication. This includes for example reading and writing GDS variables, as well as restarting the device, and processing a factory reset.
  • Missing certificates in case of project integrity in the Trust Store Code Signing led to unclear security notifications.
  • Writing primitive variables using “IDataAccessService::Write” instead of “IDataAccessService::WriteSingle”, the additional information “from <oldValue> to <newValue>” was missing in the corresponding security notification.
  • A Denial of Service (DoS) attack on port 80 could lead to a task watchdog of the running PLC application.
  • The AppManager did not lock the loading of an app in time to prevent the PlcManager from loading the eCLR project. This led to an impairment of cybersecurity, as the loaded code could still be executed in the event of an expired license.
  • A standard user on the device was able to access any files on the device. This situation was caused by misconfigured sudo permissions associated with the “nft” binary.
  • In case of user handling some notifications showed internal user-related information.

Sqlite

  • CVE-2025-6965
  • CVE-2025-7709 
  • CVE-2025-52099

WBM

  • CVE-2025-41771
  • The WBM certificate management was unable to add PEM certificates which contained “CRLF” instead of “LF”.
  • In LDAP/LDAPs WBM configuration, a port setting was not reset to default if the port was removed on existing configurations.
  • In connection with certificate management, security notifications were not generated anymore.

Firmware releases before 2026.0 LTS

For the firmware releases preceding 2026.0 LTS, known vulnerabilities and exposures have been published in the Security updates section of the Changes notes to every firmware release for this device type.