CVE-2026-110936
CVE-2026-110936 is a security flaw in Siemens Software Center. Someone who already has a way in can use Siemens Software Center to run their own code. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 20 Oct 2026.[1]
Siemens Software Center is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Fixed in version V4.0.9.8 of Siemens Software Center.
Description
CISA calls it an uncontrolled search path element in Siemens Software Center. In its words: “Siemens Software Center contains an uncontrolled search path element vulnerability that could allow an authenticated local attacker to place a specially crafted DLL in a directory that the application searches, leading to arbitrary code execution with the privileges of the affected application.”[1]
The CVE record adds: “A vulnerability has been identified in Siemens Software Center (All versions < V4.0.9.8). The affected application loads dynamic-link libraries (DLLs) from an uncontrolled search path. This could allow an authenticated local attacker to place a specially crafted DLL in a directory that the application searches, leading to arbitrary code execution with the privileges of the affected application.”[2]
The underlying weakness is CWE-427, in MITRE’s list of common software weaknesses.
It scores 6.7 out of 10 on the Common Vulnerability Scoring System, which rates it medium, scored by the organisation that published the CVE using CVSS 3.1.[2]
Affected versions
NVD’s record lists one fixed version: everything before it is affected.[2]
| Product | Fixed in |
|---|---|
| Siemens Software Center | V4.0.9.8 |
Most families won’t have Siemens Software Center; it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 20 Oct 2026, 5 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 3 Nov 2026 to fix it.[1]
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at under 1%. That’s in the top 39% of the flaws it scores.[4]
CISA assesses it as not automatable: each attack takes some work.
CISA doesn’t say who was attacked, or how.
Fix
Siemens has published a fix or advice.[3] CISA’s required action: “Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes).”[1]
- Check whether you use it.Siemens Software Center is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
- Send this page to your IT person.Ask them to confirm it’s fixed (fixed in version V4.0.9.8 of Siemens Software Center), or not in use. CISA gave US government agencies until 3 Nov 2026 to fix it.
- If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.
You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 6.7.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at under 1%.[4] | |
| CISA’s deadline for US government agencies to fix it.[1] |
See also
Other Siemens flaws
- CVE-2016-8562, Siemens SIMATIC CP: 1543-1 improper privilege management ·
Similar flaws
- CVE-2020-3433, Cisco AnyConnect Secure: mobility client for windows DLL hijacking ·
- CVE-2020-3153, Cisco AnyConnect Secure: mobility client for windows uncontrolled search path ·
Added the same day
- CVE-2026-96656, Plex Media Server: external control of file name or path ·
- CVE-2026-96655, Plex Media Server: server-side request forgery (SSRF) ·
- CVE-2026-96654, Plex Media Server: improper neutralization of encoded URI schemes in a web page ·
- CVE-2026-96652, Plex Media Server: server-side request forgery (SSRF) ·
- CVE-2026-106931, EG Secure Solutions SiteGuard Server Edition: OS command injection ·
References
- ^ Cybersecurity and Infrastructure Security Agency. “Siemens Software Center Uncontrolled Search Path Element Vulnerability”. Known Exploited Vulnerabilities Catalog, added 20 Oct 2026.
- ^ National Institute of Standards and Technology. “CVE-2026-110936 Detail”. National Vulnerability Database, published 15 Oct 2026.
- ^ Siemens. Advisories and fixes: productcert.siemens.com, cert-portal.siemens.com, productcert.siemens.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.010, percentile 61.8, 31 Oct 2026.
- CVE Program. “CVE-2026-110936”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.