HiRDB Server Version 10: Partial String Comparison
CVE-2026-115646 is a critical-severity partial string comparison vulnerability in HiRDB Server Version 10 from Hitachi, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 10-12-01 as the first without the flaw, so updating HiRDB Server Version 10 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.39% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update HiRDB Server Version 10 to 10-12-01 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Hitachi | HiRDB Server Version 10 | 10-00 up to, but not including, 10-12-01 | 10-12-01 |
| Hitachi | HiRDB Server Version 9 | 09-50-06 through 09-66-22 | Not stated |
| Hitachi | HiRDB Server with Additional Function Version 9 | 09-50-/F through 09-66/V | Not stated |
| Hitachi | HiRDB Server Version 9(32) | 09-50-06 through 09-66-22 | Not stated |
| Hitachi | HiRDB Server with Additional Function Version 9(32) | 09-50-/F through 09-66-/V | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (hitachi.co.jp).
Official description
Partial String Comparison Vulnerability in HiRDB. This issue affects HiRDB Server Version 10: from 10-00 before 10-12-01; HiRDB Server Version 9: from 09-50-06 through 09-66-22; HiRDB Server with Additional Function Version 9: from 09-50-/F through 09-66/V; HiRDB Server Version 9(32): from 09-50-06 through 09-66-22; HiRDB Server with Additional Function Version 9(32): from 09-50-/F through 09-66-/V.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Partial String Comparison
The product performs a string comparison that only examines a portion of the string before determining whether there is a match.
How developers prevent this class of flaw
- Thoroughly test the comparison scheme before deploying code into production. Perform positive testing as well as negative testing.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
References
Other vulnerabilities in HiRDB Server Version 10
- 9.4 Critical severity
- 7.5 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Partial String Comparison vulnerabilities
- 8.0 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 9.9 Critical severity
- 7.5 High severity
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