Security readout for executives and security teams
Plain-English summary
MEPSAN USC+ before version 3.0 has a login authentication weakness that may let an unauthenticated network attacker generate passwords for highly privileged accounts. The impact is potentially serious because compromise could expose sensitive data and disrupt availability, but the public sources provide limited technical detail.
Executive priority
Prioritize this for asset confirmation and remediation if USC+ supports critical operations or is reachable beyond trusted administration networks. The severity is high, but urgency depends on confirmed deployment, version, and exposure.
Technical view
CVE-2021-45031 is a CWE-305 authentication weakness in the USC+ login function. The CVSS 3.1 score is 7.7, with network attack vector, no required privileges or user interaction, high attack complexity, and high confidentiality and availability impact.
Likely exposure
Exposure is most likely where MEPSAN USC+ deployments before version 3.0 are reachable over a network. The source data does not provide CPEs, deployment patterns, or exact vulnerable build ranges beyond “before version 3.0.”
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Public detail is sparse, so defenders should treat internet-reachable or operationally sensitive USC+ login surfaces as higher priority until version and exposure are confirmed.
Researcher notes
Evidence is limited to CVE metadata and government advisory references. One USOM reference is tagged as a broken link in the bundle. No exploit code, KEV status, or detailed root-cause analysis is provided, so validation should stay defensive and version-focused.
Mitigation direction
- Upgrade MEPSAN USC+ to version 3.0 or later if available and supported.
- Check MEPSAN or national CERT guidance for product-specific remediation details.
- Restrict network access to USC+ login interfaces to trusted administrative networks.
- Review and rotate privileged USC+ account credentials after remediation.
- Monitor for unexpected privileged account or password changes.
Validation and detection
- Inventory all MEPSAN USC+ deployments and record exact versions.
- Confirm whether any USC+ instance is older than version 3.0.
- Identify whether USC+ login interfaces are exposed to untrusted networks.
- Review account audit data for unexpected privileged password generation or changes.
- Verify compensating access controls around any instance awaiting upgrade.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-305: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-45031 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H2.25.5TR-CERTVulnerability scoring details
Base CVSS 3.1 score
7.7HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.usom.gov.tr/bildirim/tr-22-0269CVE reference, TR-CERT · government-resource, broken-link
- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-22-0269CVE reference, TR-CERT · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Authentication Bypass by Primary Weakness
Authentication Bypass by Primary Weakness represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.