CVE-2020-25860

highpriority · track · 37EPSS 0.014 · 73 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

1.45% (73rd) EPSS

CVSS 7.1 · high

Is it mine?

23 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · phoenix_contact_psirt

EPSS · scored 2026-10-27

The install.c module in the Pengutronix RAUC update client prior to version 1.5 has a Time-of-Check Time-of-Use vulnerability, where signature verification on an update file takes place before the file is reopened for installation. An attacker who can modify the update file just before it is reopened can install arbitrary code on the device.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedphoenix_contact_psirt
Phoenix Contact strongly recommends updating to the latest firmware mentioned in the list below, which fixes this vulnerability. For EEM-SB370, EEM-SB371 and CHARX control modular the fix will be available until end of Q3 2021. This advisory will be updated as soon the fix is available. | **Product Number** | **Product Name** | **Fixed Version** | |--------------------|------------------------------------|-----------------------------| | 1151412 | AXC F 1152 | 2021.0.5 LTS external link | | 2404267 | AXC F 2152 | 2021.0.5 LTS external link | | 1069208 | AXC F 3152 | 2021.0.5 LTS external link | | 1051328 | RFC 4072S | 2021.0.5 LTS external link | | 1046568 | AXC F 2152 Starterkit | 2021.0.5 LTS external link | | 1188165 | PLCnext Technology Starterkit | 2021.0.5 LTS external link | | 1110435 | SMARTRTU AXC SG | End of Q3 2021 | | 1264328 | SMARTRTU AXC IG | End of Q3 2021 | | 1264327 | ENERGY AXC PU | End of Q3 2021 | | 1158951 | EEM-SB370-C | End of Q3 2021 | | 1158947 | EEM-SB371-C | End of Q3 2021 | | 1139022 | CHARX control modular 3000 | End of Q3 2021 | | 1139022 | CHARX control modular 3050 | End of Q3 2021 | | 1139012 | CHARX control modular 3100 | End of Q3 2021 | | 1138965 | CHARX control modular 3150 | End of Q3 2021 |
Mitigationphoenix_contact_psirt
Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note: Measures to protect network-capable devices with Ethernet connection

cvss

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.3–7.1

v2.07.1highAV:N/AC:H/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.16.6mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 0.7 · impact 5.9

v3.16.6mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · Phoenix Contact PSIRT DE

v3.16.3mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-367USprimaryCWE-367US

exploits (1)

Public proof-of-concept and weaponised exploit code.

rauc/rauc-1.5-integrationintegration examples for the CVE-2020-25860 fixPoC · poc_in_github

affected products (23)

Products and version ranges known to be affected.

n/a Pengutronix RAUC≤ All versions before 1.5enisa_euvdEU
pengutronix rauc< 1.5nvdUScpe:2.3:a:pengutronix:rauc:*:*:*:*:*:*:*:*
Firmware 2021.0.5 LTS installed on AXC F 1152all versionsfixedphoenix_contact_psirtDE
Firmware 2021.0.5 LTS installed on AXC F 2152all versionsfixedphoenix_contact_psirtDE
Firmware 2021.0.5 LTS installed on AXC F 2152 Starterkitall versionsfixedphoenix_contact_psirtDE
Firmware 2021.0.5 LTS installed on AXC F 3152all versionsfixedphoenix_contact_psirtDE
Firmware 2021.0.5 LTS installed on PLCnext Technology Starterkitall versionsfixedphoenix_contact_psirtDE
Firmware 2021.0.5 LTS installed on RFC 4072Sall versionsfixedphoenix_contact_psirtDE
Firmware <=2021.0 LTS installed on AXC F 1152all versionsphoenix_contact_psirtDE
Firmware <=2021.0 LTS installed on AXC F 2152all versionsphoenix_contact_psirtDE
Firmware <=2021.0 LTS installed on AXC F 2152 Starterkitall versionsphoenix_contact_psirtDE
Firmware <=2021.0 LTS installed on AXC F 3152all versionsphoenix_contact_psirtDE
Firmware <=2021.0 LTS installed on PLCnext Technology Starterkitall versionsphoenix_contact_psirtDE
Firmware <=2021.0 LTS installed on RFC 4072Sall versionsphoenix_contact_psirtDE
Firmware <=2021.02.01 installed on EEM-SB370-Call versionsphoenix_contact_psirtDE
Firmware <=2021.02.01 installed on EEM-SB371-Call versionsphoenix_contact_psirtDE
Firmware <=V1.0.0.0 installed on SMARTRTU AXC IGall versionsphoenix_contact_psirtDE
Firmware <=V1.0.11 installed on CHARX control modular 3000all versionsphoenix_contact_psirtDE
Firmware <=V1.0.11 installed on CHARX control modular 3050all versionsphoenix_contact_psirtDE
Firmware <=V1.0.11 installed on CHARX control modular 3100all versionsphoenix_contact_psirtDE

showing 20 of 23

advisories (1)

Vendor and ecosystem advisories describing this.

VDE-2021-024PHOENIX CONTACT: Security Advisory for PLCNext, SMARTRTU AXC, CHARX control modular and EEM-SB37x2021-05-04csaf · phoenix_contact_psirtDE
The vulnerability is a Time-of-Check-Time-of-Use (CWE-367) issue which allows an attacker with access to the firmware update file to overwrite it after it has been verified (but before installation is completed), which consequently allows installing an arbitrary firmware update, bypassing the cryptographic signature check mechanism.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd phoenix_contact_psirt NVD CVE.org MITRE

published 2020-12-21modified 2026-06-17

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+1056 more

references (7)

External citations — patches, advisories, analysis.

scry

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