CVE-2021-31718
The server in npupnp before 4.1.4 is affected by DNS rebinding in the embedded web server (including UPnP SOAP and GENA endpoints), leading to remote code execution.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The server in npupnp before 4.1.4 is affected by DNS rebinding in the embedded web server (including UPnP SOAP and GENA endpoints), leading to remote code execution.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.96% probability · 61th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-346
- Affected
- npupnp project/npupnp
- Source
- cve@mitre.org
EPSS 1.0% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2021/04/25/2Mailing List, Third Party Advisory
- https://framagit.org/medoc92/npupnpThird Party Advisory
- https://www.lesbonscomptes.com/upmpdcli/npupnp-doc/libnpupnp.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/04/25/2Mailing List, Third Party Advisory
- https://framagit.org/medoc92/npupnpThird Party Advisory
- https://www.lesbonscomptes.com/upmpdcli/npupnp-doc/libnpupnp.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.