VDB-362984 · CVE-2026-25789 · ssa-688146

Siemens SIMATIC S7-150 up to 3.1.5 Firmware Update Page cross site scripting

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8	$0-$5k	0.00

Summaryinfo

Detailsinfo

Affected devices do not properly validate and sanitize filenames on the Firmware Update page. This could allow a remote attacker to social engineer the user into selecting the modified firmware file to be uploaded. This would result in malitcious JavaScript execution in the context of the authenticated user's session without requiring the file to be uploaded, potentially leading to session hijacking or credential theft.

The advisory is shared for download at cert-portal.siemens.com. This vulnerability is handled as CVE-2026-25789 since 02/05/2026. The exploitation is known to be difficult. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/12/2026). The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 3.1.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1474). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

Siemens SIMATIC S7

Productinfo

Type

SCADA Software

Vendor

Siemens

Name

Version

License

commercial

Website

Vendor: https://www.siemens.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.8

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (siemens): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SIMATIC Drive Controller CPU 1504D TF/SIMATIC Drive Controller CPU 1507D TF/SIMATIC ET 200SP CPU 1510SP F-1 PN/SIMATIC ET 200SP CPU 1510SP-1 PN/SIMATIC ET 200SP CPU 1512SP F-1 PN/SIMATIC ET 200SP CPU 1512SP-1 PN/SIMATIC ET 200SP CPU 1514SP F-2 PN/SIMATIC ET 200SP CPU 1514SP-2 PN/SIMATIC ET 200SP CPU 1514SPT F-2 PN/SIMATIC ET 200SP CPU 1514SPT-2 PN/SIMATIC ET 200SP Open Controller CPU 1515SP PC/SIMATIC ET 200SP Open Controller CPU 1515SP PC2 V2 CPUs/SIMATIC ET 200SP Open Controller CPU 1515SP PC2 V3 CPUs/SIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs/SIMATIC S7-1500 CPU 1511-1 PN/SIMATIC S7-1500 CPU 1511C-1 PN/SIMATIC S7-1500 CPU 1511F-1 PN/SIMATIC S7-1500 CPU 1511T-1 PN/SIMATIC S7-1500 CPU 1511TF-1 PN/SIMATIC S7-1500 CPU 1512C-1 PN/SIMATIC S7-1500 CPU 1513-1 PN/SIMATIC S7-1500 CPU 1513F-1 PN/SIMATIC S7-1500 CPU 1513pro F-2 PN/SIMATIC S7-1500 CPU 1513pro-2 PN/SIMATIC S7-1500 CPU 1515-2 PN/SIMATIC S7-1500 CPU 1515F-2 PN/SIMATIC S7-1500 CPU 1515T-2 PN/SIMATIC S7-1500 CPU 1515TF-2 PN/SIMATIC S7-1500 CPU 1516-3 PN/DP/SIMATIC S7-1500 CPU 1516F-3 PN/SIMATIC S7-1500 CPU 1516pro F-2 PN/SIMATIC S7-1500 CPU 1516pro-2 PN/SIMATIC S7-1500 CPU 1516T-3 PN/SIMATIC S7-1500 CPU 1516TF-3 PN/SIMATIC S7-1500 CPU 1517-3 PN/SIMATIC S7-1500 CPU 1517F-3 PN/SIMATIC S7-1500 CPU 1517T-3 PN/SIMATIC S7-1500 CPU 1517TF-3 PN/SIMATIC S7-1500 CPU 1518-3 PN/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP/SIMATIC S7-1500 CPU 1518F-3 PN/SIMATIC S7-1500 CPU 1518F-4 PN/SIMATIC S7-1500 CPU 1518T-3 PN/SIMATIC S7-1500 CPU 1518T-4 PN/SIMATIC S7-1500 CPU 1518TF-3 PN/SIMATIC S7-1500 CPU 1518TF-4 PN/SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK/SIMATIC S7-1500 CPU S7-1518F-4 PN/SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN/SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN/SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN/SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN/SIMATIC S7-1500 Software Controller CPU 1507S F V2/SIMATIC S7-1500 Software Controller CPU 1507S F V3/SIMATIC S7-1500 Software Controller CPU 1507S F V4/SIMATIC S7-1500 Software Controller CPU 1507S V2/SIMATIC S7-1500 Software Controller CPU 1507S V3/SIMATIC S7-1500 Software Controller CPU 1507S V4/SIMATIC S7-1500 Software Controller CPU 1508S F V2/SIMATIC S7-1500 Software Controller CPU 1508S F V3/SIMATIC S7-1500 Software Controller CPU 1508S F V4/SIMATIC S7-1500 Software Controller CPU 1508S T V3/SIMATIC S7-1500 Software Controller CPU 1508S TF V3/SIMATIC S7-1500 Software Controller CPU 1508S V2/SIMATIC S7-1500 Software Controller CPU 1508S V3/SIMATIC S7-150 3.1.6

Timelineinfo

02/05/2026 CVE reserved
05/12/2026 +95 days Advisory disclosed
05/12/2026 +0 days VulDB entry created
05/12/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-688146
Status: Confirmed

CVE: CVE-2026-25789 (🔒)
GCVE (CVE): GCVE-0-2026-25789
GCVE (VulDB): GCVE-100-362984
CERT Bund: WID-SEC-2026-1474 - Siemens SIMATIC S7 PLCs Web Server: Mehrere Schwachstellen ermöglichen Cross-Site Scripting

Entryinfo

Created: 05/12/2026 11:43
Updated: 05/12/2026 13:54
Changes: 05/12/2026 11:43 (78), 05/12/2026 13:54 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.