CVE-2020-12695
The Open Connectivity Foundation UPnP specification before 2020-04-17 does not forbid the acceptance of a subscription request with a delivery URL on a different network segment than the fully qualified event-subscription URL, aka the CallStranger issue.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 15.2%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
The Open Connectivity Foundation UPnP specification before 2020-04-17 does not forbid the acceptance of a subscription request with a delivery URL on a different network segment than the fully qualified event-subscription URL, aka the CallStranger issue.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:H
- EPSS
- 15.19% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-276
- Affected
- ui/unifi controller · w1.fi/hostapd · asus/rt-n11 · broadcom/adsl · canon/selphy cp1200 · cisco/wap131 · cisco/wap150 · cisco/wap351 · dlink/dvg-n5412sp · dell/b1165nfw · epson/ep-101 · epson/ew-m970a3t · epson/m571t · epson/xp-100 · epson/xp-2101 · epson/xp-2105 · epson/xp-241 · epson/xp-320 · epson/xp-330 · epson/xp-340 · +40 more
- Source
- cve@mitre.org
EPSS 15.2% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/158051/CallStranger-UPnP-Vulnerability-Checker.htmlThird Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2020/06/08/2Mailing List, Third Party Advisory
- https://corelight.blog/2020/06/10/detecting-the-new-callstranger-upnp-vulnerability-with-zeek/Third Party Advisory
- https://github.com/corelight/callstranger-detectorThird Party Advisory
- https://github.com/yunuscadirci/CallStrangerThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00011.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00013.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00017.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3SHL4LOFGHJ3DIXSUIQELGVBDJ7V7LB/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZDWHKGN3LMGSUEOAAVAMOD3IUIPJVOJ/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RQEYVY4D7LASH6AI4WK3IK2QBFHHF3Q2/Mailing List, Third Party Advisory
- https://usn.ubuntu.com/4494-1/Third Party Advisory
- https://www.callstranger.comBroken Link
- https://www.debian.org/security/2020/dsa-4806Third Party Advisory
- https://www.debian.org/security/2021/dsa-4898Third Party Advisory
- https://www.kb.cert.org/vuls/id/339275Third Party Advisory, US Government Resource
- https://www.tenable.com/blog/cve-2020-12695-callstranger-vulnerability-in-universal-plug-and-play-upnp-puts-billions-ofThird Party Advisory
- http://packetstormsecurity.com/files/158051/CallStranger-UPnP-Vulnerability-Checker.htmlThird Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2020/06/08/2Mailing List, Third Party Advisory
- https://corelight.blog/2020/06/10/detecting-the-new-callstranger-upnp-vulnerability-with-zeek/Third Party Advisory
- https://github.com/corelight/callstranger-detectorThird Party Advisory
- https://github.com/yunuscadirci/CallStrangerThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00011.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00013.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00017.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3SHL4LOFGHJ3DIXSUIQELGVBDJ7V7LB/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZDWHKGN3LMGSUEOAAVAMOD3IUIPJVOJ/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RQEYVY4D7LASH6AI4WK3IK2QBFHHF3Q2/Mailing List, Third Party Advisory
- https://usn.ubuntu.com/4494-1/Third Party Advisory
- https://www.callstranger.comBroken Link
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.