Buffer overflow in Siemens LOGO! 8 BM
Priority MEDIUM 53CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (V1.81.01 - V1.81.03), LOGO! 8 BM (incl. SIPLUS variants) (V1.82.01), LOGO! 8 BM (incl. SIPLUS variants) (V1.82.02). A buffer overflow vulnerability exists in the Web Server functionality of the device. A remote unauthenticated attacker could send a specially crafted HTTP request to cause a memory corruption, potentially resulting in remote code execution.
Why it matters now
EPSS 0.08723 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Siemens | LOGO! 8 BM (incl. SIPLUS variants) | V1.81.01 - V1.81.03 | — | No fix listed | CNA |
| Siemens | LOGO! 8 BM (incl. SIPLUS variants) | V1.82.01 | — | No fix listed | CNA |
| Siemens | LOGO! 8 BM (incl. SIPLUS variants) | V1.82.02 | — | No fix listed | CNA |
- LOGO! 8 BM (incl. SIPLUS variants) VendorSiemens Affected V1.81.01 - V1.81.03 Fixed in — No fix listed CNA
- LOGO! 8 BM (incl. SIPLUS variants) VendorSiemens Affected V1.82.01 Fixed in — No fix listed CNA
- LOGO! 8 BM (incl. SIPLUS variants) VendorSiemens Affected V1.82.02 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:siemens:logo\!_8_bm_firmware:*:*:*:*:*:*:*:* | 1.81.01 – 1.81.03 | Vulnerable | Siemens |
| cpe:2.3:o:siemens:logo\!_8_bm_firmware:1.82.01:*:*:*:*:*:*:* | 1.82.01 | Vulnerable | Siemens |
| cpe:2.3:o:siemens:logo\!_8_bm_firmware:1.82.02:*:*:*:*:*:*:* | 1.82.02 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:logo\!_8_bm:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
- cpe:2.3:o:siemens:logo\!_8_bm_firmware:*:*:*:*:*:*:*:* Versions 1.81.01 – 1.81.03 Vulnerable ·Siemens
- cpe:2.3:o:siemens:logo\!_8_bm_firmware:1.82.01:*:*:*:*:*:*:* Versions 1.82.01 Vulnerable ·Siemens
- cpe:2.3:o:siemens:logo\!_8_bm_firmware:1.82.02:*:*:*:*:*:*:* Versions 1.82.02 Vulnerable ·Siemens
- cpe:2.3:h:siemens:logo\!_8_bm:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-7593
- 2026-10-03 Alias added: GHSA-x26m-wcf2-85xw
- 2026-10-05 EPSS moved to the 95th–99th percentile
References
More Siemens Logo! 8 Bm Firmware vulnerabilities
- TI-2022-16702 Buffer overflow in Siemens LOGO! 12/24RCE CVSS 3.1CRITICAL 9.8
- TI-2020-15465 Missing authentication in Siemens LOGO! 8 BM CVSS 3.1CRITICAL 9.8
- TI-2020-06111 Missing authentication in Siemens LOGO! 8 BM CVSS 3.1CRITICAL 9.1
- TI-2020-15472 Insufficiently protected credentials in Siemens LOGO! 8 BM CVSS 3.1HIGH 7.5
- TI-2022-16703 Improper input validation in Siemens LOGO! 12/24RCE CVSS 3.1HIGH 7.5
- TI-2017-09440 A vulnerability has been identified in LOGO! 8 BM (incl. CVSS 3.1HIGH 7.4
Sources
- CVE-2020-7593 · CVE Program
- CVE-2020-7593 · NVD
- FIRST EPSS
- GHSA-x26m-wcf2-85xw · GitHub Advisory Database · CC BY 4.0
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