CVE-2021-45488
In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.
In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.
- Record
CVE-2021-45488- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-330
- Updated
- 2026-11-02
CVE List No score
In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.
- Record
CVE-2021-45488- Updated
- 2026-11-02
EUVDEUVD-2021-32254 No score
In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.
- Record
EUVD-2021-32254- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-ppq5-qxwq-whvw
In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.
In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.
- Record
GHSA-ppq5-qxwq-whvw- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-327
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45488 is a high vulnerability (CVSS 7.5) in Netbsd, published December 25, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.00%, the 62nd percentile. No source names a fixed version.