A buffer overflow vulnerability was found in some devices of Hirschmann Automation and Control HiOS and HiSecOS.
A buffer overflow vulnerability was found in some devices of Hirschmann Automation and Control HiOS and HiSecOS. The vulnerability is due to improper parsing of URL arguments. An attacker could exploit this vulnerability by specially crafting HTTP requests to overflow an internal buffer. The following devices using HiOS Version 07.0.02 and lower are affected: RSP, RSPE, RSPS, RSPL, MSP, EES, EES, EESX, GRS, OS, RED. The following devices using HiSecOS Version 03.2.00 and lower are affected: EAGLE20/30.
- Published
- Apr 3, 2020
- Updated
- Jun 16, 2026
- EPSS
- 1.6% · 76th percentile
- CWE
- CWE-12
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Report tools
Action score
39
Monitor
Low priority for now.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.6%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; 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 helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| belden | hirschmann hios | cpe:2.3:o:belden:hirschmann_hios |
| belden | hirschmann embedded ethernet switch | cpe:2.3:h:belden:hirschmann_embedded_ethernet_switch |
| belden | hirschmann embedded ethernet switch extended | cpe:2.3:h:belden:hirschmann_embedded_ethernet_switch_extended |
| belden | hirschmann greyhound swtich | cpe:2.3:h:belden:hirschmann_greyhound_swtich |
| belden | hirschmann mice switch power | cpe:2.3:h:belden:hirschmann_mice_switch_power |
| belden | hirschmann octopus | cpe:2.3:h:belden:hirschmann_octopus |
| belden | hirschmann prp redbox | cpe:2.3:h:belden:hirschmann_prp_redbox |
| belden | hirschmann rail switch power | cpe:2.3:h:belden:hirschmann_rail_switch_power |
| belden | hirschmann rail switch power enhanced | cpe:2.3:h:belden:hirschmann_rail_switch_power_enhanced |
| belden | hirschmann rail switch power lite | cpe:2.3:h:belden:hirschmann_rail_switch_power_lite |
| belden | hirschmann rail switch power smart | cpe:2.3:h:belden:hirschmann_rail_switch_power_smart |
| belden | hirschmann hisecos | cpe:2.3:o:belden:hirschmann_hisecos |
and 2 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- belden hirschmann hiosup to 07.0.02 inclusive
- belden hirschmann hisecosup to 03.2.00 inclusive
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.
Hirschmann Automation and Control GmbH, a division of Belden Inc. HiOS for the following devices RSP, RSPE, RSPS, RSPL, MSP, EES, EES, EESX, GRS, OS, RED
- 07.0.02 and loweraffected
Hirschmann Automation and Control GmbH, a division of Belden Inc. HiSecOS for device EAGLE20/30
- 03.2.00 and loweraffected
Same product
belden: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-27734Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the crede39Monitor
- CVE-2018-25236Hirschmann HiOS HiSecOS Authentication Bypass via HTTP Management37Monitor
- CVE-2020-37216Hirschmann HiOS EtherNet/IP Stack Denial of Service34Monitor
- CVE-2020-9307Hirschmann OS2, RSP, and RSPE devices before HiOS 08.3.00 allow a denial of service.26Monitor
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.
No credits in the CNA record.
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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-20-184 · Apr 1, 2020(Hirschmann Automation and Control Endüstriyel Ürünler Zafiyeti)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-12 · ASP.NET Misconfiguration: Missing Custom Error PageCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.