CVE-2017-9861
The SIP implementation does not properly use authentication with encryption: it is vulnerable to replay attacks, packet injection attacks, and man in the middle attacks.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in SMA Solar Technology products. The SIP implementation does not properly use authentication with encryption: it is vulnerable to replay attacks, packet injection attacks, and man in the middle attacks. An attacker is able to successfully use SIP to communicate with the device from anywhere within the LAN. An attacker may use this to crash the device, stop it from communicating with the SMA servers, exploit known SIP vulnerabilities, or find sensitive information from the SIP communications. Furthermore, because the SIP communication channel is unencrypted, an attacker capable of understanding the protocol can eavesdrop on communications. For example, passwords can be extracted. NOTE: the vendor's position is that authentication with encryption is not required on an isolated subnetwork. Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.41% probability · 72th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- sma/sunny boy 3600 firmware · sma/sunny boy 5000 firmware · sma/sunny tripower core1 firmware · sma/sunny tripower 15000tl firmware · sma/sunny tripower 20000tl firmware · sma/sunny tripower 25000tl firmware · sma/sunny tripower 5000tl firmware · sma/sunny tripower 12000tl firmware · sma/sunny tripower 60 firmware · sma/sunny boy 3000tl firmware · sma/sunny boy 3600tl firmware · sma/sunny boy 4000tl firmware · sma/sunny boy 5000tl firmware · sma/sunny boy 1.5 firmware · sma/sunny boy 2.5 firmware · sma/sunny boy 3.0 firmware · sma/sunny boy 3.6 firmware · sma/sunny boy 4.0 firmware · sma/sunny boy 5.0 firmware · sma/sunny central 2200 firmware · +19 more
- Source
- cve@mitre.org
EPSS 1.4% since 27 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.sma.de/en/statement-on-cyber-security.html
- http://www.sma.de/fileadmin/content/global/specials/documents/cyber-security/Whitepaper-Cyber-Security-AEN1732_07.pdf
- https://horusscenario.com/CVE-information/Third Party Advisory
- http://www.sma.de/en/statement-on-cyber-security.html
- http://www.sma.de/fileadmin/content/global/specials/documents/cyber-security/Whitepaper-Cyber-Security-AEN1732_07.pdf
- https://horusscenario.com/CVE-information/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.