wolfSSL Bleichenbacher/ROBOT
Priority MEDIUM 55CWE-203Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-203.
Summary
wolfSSL prior to version 3.12.2 provides a weak Bleichenbacher oracle when any TLS cipher suite using RSA key exchange is negotiated. An attacker can recover the private key from a vulnerable wolfSSL application. This vulnerability is referred to as "ROBOT."
Why it matters now
EPSS 0.27383 98th percentileScored 2026-11-07
Fix Fixed wolfSSL (wolfSSL): 3.12.2
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| wolfSSL | wolfSSL | before 3.12.2 | 3.12.2 | Patch available | CNA |
- wolfSSL VendorwolfSSL Affected before 3.12.2 Fixed in 3.12.2 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* | before 3.12.2 | Vulnerable | wolfSSL |
| cpe:2.3:o:siemens:scalance_w1750d_firmware:*:*:*:*:*:*:*:* | before 8.3.0.1 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:scalance_w1750d:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:a:arubanetworks:instant:*:*:*:*:*:*:*:* | before 6.5.4.6 | Vulnerable | Arubanetworks |
- cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* Versions before 3.12.2 Vulnerable ·wolfSSL
- cpe:2.3:o:siemens:scalance_w1750d_firmware:*:*:*:*:*:*:*:* Versions before 8.3.0.1 Vulnerable ·Siemens
- cpe:2.3:h:siemens:scalance_w1750d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:a:arubanetworks:instant:*:*:*:*:*:*:*:* Versions before 6.5.4.6 Vulnerable ·Arubanetworks
Remediation
- Fix · CNA wolfSSL (wolfSSL) Fixed in 3.12.2
Timeline
- 2026-10-02 Threatist record created from CVE-2017-13099
- 2026-10-03 Alias added: GHSA-97gp-82pc-qc6x
References
More Wolfssl vulnerabilities
- TI-2024-00830 SEGV and out of bounds memory read from malicious packet CVSS 3.1CRITICAL 9.1
- TI-2022-18557 In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3… CVSS 3.1HIGH 7.5
- TI-2025-10943 Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello CVSS 4.0MEDIUM 6.3
- TI-2019-08902 wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity… CVSS 3.1CRITICAL 9.8
- TI-2017-02021 Improper certificate validation in wolfSSL CVSS 3.1CRITICAL 9.8
- TI-2022-20901 In wolfSSL before 5.5.2, if callback functions are enabled (via the WOLFSSL_CALLBACKS… CVSS 3.1CRITICAL 9.1
Sources
- CVE-2017-13099 · CVE Program
- CVE-2017-13099 · NVD
- FIRST EPSS
- GHSA-97gp-82pc-qc6x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences