What is CVE-2023-2873?

CVE-2023-2873 is a medium-severity vulnerability in Filseclab Twister Antivirus, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2023-05-24.

How severe is CVE-2023-2873?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2023-2873 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Filseclab Twister Antivirus

CVE-2023-2873

A vulnerability classified as critical was found in Twister Antivirus 8. This vulnerability affects the function 0x804f2143/0x804f217f/0x804f214b/0x80800043 in the library filppd.sys of the component IoControlCode Handler. The manipulation leads to memory corruption. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-229852. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Vulnerability class: Buffer Overflow

Published 2023-05-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (27.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

zeze-zeze/WindowsKernelVuln

References

vuldb.com/ (technical-description, Third Party Advisory, vdb-entry)
vuldb.com/ (signature, Permissions Required, permissions-required, Third Party Advisory)
github.com/zeze-zeze/WindowsKernelVuln/blob/master/CVE-2023-2873 (related, Exploit, Third Party Advisory)
drive.google.com/file/d/1ABRMxr6Ek02P_WAXjyYLGQ4sHYMVQTka/view (Exploit, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2023-2873?: CVE-2023-2873 is a medium-severity vulnerability in Filseclab Twister Antivirus, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2023-05-24.
How severe is CVE-2023-2873?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2023-2873 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.