CVE-2023-4991
CVE-2023-4991 is a high-severity vulnerability in Quescom Nextbx Qwalerter with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-428.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 0% (15th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-428
- Affected product: Quescom Nextbx Qwalerter
- Published:
- Last modified:
Description
A vulnerability was found in NextBX QWAlerter 4.50. It has been rated as critical. Affected by this issue is some unknown functionality of the file QWAlerter.exe. The manipulation leads to unquoted search path. It is possible to launch the attack on the local host. The identifier of this vulnerability is VDB-239804. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Frequently asked questions
- What is CVE-2023-4991?
- A vulnerability was found in NextBX QWAlerter 4.50. It has been rated as critical. Affected by this issue is some unknown functionality of the file QWAlerter.exe. The manipulation leads to unquoted search path. It is possible to launch the attack on the local host. The identifier of this vulnerability is VDB-239804. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
- How severe is CVE-2023-4991?
- CVE-2023-4991 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2023-4991 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-4991?
- CVE-2023-4991 affects Quescom Nextbx Qwalerter. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-4991?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2023-4991 published?
- CVE-2023-4991 was published on 2023-09-15 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:quescom:nextbx_qwalerter:4.50:*:*:*:*:*:*:*
Other CWE-428 vulnerabilities
- CVE-2022-50935 — Critical (CVSS 9.8): Flame II HSPA USB Modem contains an unquoted service path vulnerability in its Windows service configuration. Attackers…
- CVE-2023-38408 — Critical (CVSS 9.8): The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to…
- CVE-2022-36344 — Critical (CVSS 9.8): An unquoted search path vulnerability exists in 'JustSystems JUST Online Update for J-License' bundled with multiple…
- CVE-2020-9292 — Critical (CVSS 9.8): An unquoted service path vulnerability in the FortiSIEM Windows Agent component may allow an attacker to gain elevated…
- CVE-2019-17658 — Critical (CVSS 9.8): An unquoted service path vulnerability in the FortiClient FortiTray component of FortiClientWindows v6.2.2 and prior…
- CVE-2019-8459 — Critical (CVSS 9.8): Check Point Endpoint Security Client for Windows, with the VPN blade, before version E80.83, starts a process without…