Schneider Electric OFS Stack Buffer Overflow
Stack-based buffer overflow in the C++ sample client in Schneider Electric OPC Factory Server (OFS) TLXCDSUOFS33 - 3.35, TLXCDSTOFS33 - 3.35, TLXCDLUOFS33 - 3.35, TLXCDLTOFS33 - 3.35, and TLXCDLFOFS33 - 3.35 allows local users to gain privileges via vectors involving a malformed configuration file.
- Published
- Feb 28, 2014
- Updated
- Jun 16, 2026
- EPSS
- 0.5% · 38th percentile
- CWE
- CWE-121
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Report tools
Action score
27
Monitor
Low priority for now.
- CVSS
- 27 / 40 · 6.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CNA vs NVD score
- NVD
- 6.9
- CNA · icscert
- 6.8
- 0.1 point gap
AV:L/AC:L/Au:S/C:C/I:C/A:C
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| schneider-electric | ofs test client tlxcdlfofs33 | cpe:2.3:a:schneider-electric:ofs_test_client_tlxcdlfofs33 |
| schneider-electric | ofs test client tlxcdltofs33 | cpe:2.3:a:schneider-electric:ofs_test_client_tlxcdltofs33 |
| schneider-electric | ofs test client tlxcdluofs33 | cpe:2.3:a:schneider-electric:ofs_test_client_tlxcdluofs33 |
| schneider-electric | ofs test client tlxcdstofs33 | cpe:2.3:a:schneider-electric:ofs_test_client_tlxcdstofs33 |
| schneider-electric | ofs test client tlxcdsuofs33 | cpe:2.3:a:schneider-electric:ofs_test_client_tlxcdsuofs33 |
| schneider-electric | opc factory server | cpe:2.3:a:schneider-electric:opc_factory_server |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- schneider-electric ofs test client tlxcdlfofs333.35
- schneider-electric ofs test client tlxcdltofs333.35
- schneider-electric ofs test client tlxcdluofs333.35
- schneider-electric ofs test client tlxcdstofs333.35
- schneider-electric ofs test client tlxcdsuofs333.35
- schneider-electric opc factory server3.35
Versions reported by the vendor
Affected version ranges reported by the assigning authority (icscert). Independent of NVD's CPE analysis and usually ahead of it.
Schneider Electric TLXCDLFOFS33
- V3.35affected
Schneider Electric TLXCDLTOFS33
- V3.35affected
Schneider Electric TLXCDLUOFS33
- V3.35affected
Schneider Electric TLXCDSTOFS33
- V3.35affected
Schneider Electric TLXCDSUOFS33
- V3.35affected
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
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.
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 researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Schneider Electricfinder
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.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- C · data can be read
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- C
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
CWE-121 · Stack-based Buffer OverflowCVSS vector
AV:L/AC:M/Au:N/C:C/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.securityfocus.com/bid/65871
- download.schneider-electric.com/files?p_Doc_Ref=SEVD%202014-031-01
- www.cisa.gov/news-events/ics-advisories/icsa-14-058-02
- download.schneider-electric.com/files?p_Doc_Ref=SEVD%202014-031-01
- ics-cert.us-cert.gov/advisories/ICSA-14-058-02
Vendor advisories and official records. Exploit/PoC links are deliberately left out.