- 2.3LowCVSS base score
- 1.2%Exploitation in 30 daysEPSS · top 32% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
A vulnerability has been found in tcpreplay 4.5.1. This vulnerability affects the function mask_cidr6 of the file cidr.c of the component tcpprep. The manipulation leads to heap-based buffer overflow. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used. The researcher is able to reproduce this with the latest official release 4.5.1 and the current master branch. The code maintainer cannot reproduce this for 4.5.2-beta1. In his reply the maintainer explains that "[i]n that case, this is a duplicate that was fixed in 4.5.2."
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. 4 references of the record are tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits4
References tagged exploit4 references
- Submit #623639 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (Duplicate) (opens in a new tab)third-party-advisoryexploit
- https://github.com/appneta/tcpreplay/issues/958 (opens in a new tab)issue-trackingexploit
- https://drive.google.com/file/d/13SQYVIb_YQoRfaJaaLf6iLtMiCRCHlBc/view?usp=sharing (opens in a new tab)exploit
- https://github.com/appneta/tcpreplay/issues/959 (opens in a new tab)issue-trackingexploit
Timeline
ID reserved
By VulDB
- 1 day later
· 1 day later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulDBCNA (assigner) | 4.0 | Low2.3 | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P |
| VulDBCNA (assigner) | 3.1 | Low3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C |
| VulDBCNA (assigner) | 3.0 | Low3.1 | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C |
| VulDBCNA (assigner) | 2.0 | Low2.6 | AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:C |
| NVDNVD · Analyzed | 4.0 | Low1.3 | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 1.2% · top 32% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.3.
Affected products
tcpreplay
- affected 4.5.1
References
References11
- VDB-320080 | tcpreplay tcpprep cidr.c mask_cidr6 heap-based overflow (opens in a new tab)vdb-entrytechnical-description
- VDB-320080 | CTI Indicators (IOB, IOC, IOA) (opens in a new tab)signaturepermissions-required
- Submit #623635 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (opens in a new tab)third-party-advisory
- Submit #623636 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (Duplicate) (opens in a new tab)third-party-advisory
- Submit #623637 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (Duplicate) (opens in a new tab)third-party-advisory
- Submit #623638 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (Duplicate) (opens in a new tab)third-party-advisory
- Submit #623639 | tcpreplay tcpprep tcpreplay version 6fcbf03 (the newest master in https://github.com/appneta/tcpreplay) Heap Buffer Overflow (Duplicate) (opens in a new tab)third-party-advisoryexploit
- https://github.com/appneta/tcpreplay/issues/958 (opens in a new tab)issue-trackingexploit
- https://github.com/appneta/tcpreplay/issues/958#issuecomment-3124876035 (opens in a new tab)issue-tracking
- https://drive.google.com/file/d/13SQYVIb_YQoRfaJaaLf6iLtMiCRCHlBc/view?usp=sharing (opens in a new tab)exploit
- https://github.com/appneta/tcpreplay/issues/959 (opens in a new tab)issue-trackingexploit
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-24989 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-9019)Record last updated .