# Wolfssl wolfSSH vulnerabilities

Source: https://junglewise.ai/threats/technologies/wolfssl-wolfssh  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/wolfssl-wolfssh.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Wolfssl wolfSSH: 0 in the last 7 days and 5 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-84897, was published on 7 October 2026. Nothing in the last four weeks, down from 5 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 5
- All time: 5 (0 critical, 0 exploited in the wild)

## About Wolfssl wolfSSH

Lightweight embedded SSH client and server library for secure shell communication.

## Latest Wolfssl wolfSSH vulnerabilities

- [CVE-2026-84897: wolfSSL wolfSSH Diffie-Hellman group exchange message handling bypass](https://junglewise.ai/threats/cve-2026-84897-src-internal-c-in-wolfssl-wolfssh-through-1-5-0-admits-the-server) (info, published 7 Oct 2026)
- [CVE-2026-83742: wolfSSL wolfSSH unsigned integer underflow in wstrncat()](https://junglewise.ai/threats/cve-2026-83742-unsigned-integer-underflow-in-wstrncat-in-src-port-c-in-wolfssl) (info, published 7 Oct 2026)
- [CVE-2026-83540: wolfSSL wolfSSHd Windows logon token release-of-resource vulnerability](https://junglewise.ai/threats/cve-2026-83540-when-password-or-public-key-authentication-is-used-with-the) (info, published 7 Oct 2026)
- [CVE-2026-81535: wolfSSH forwarded-tcpip channel authorization bypass](https://junglewise.ai/threats/cve-2026-81535-in-wolfssh-through-1-5-0-built-with-enable-fwd-dochannelopen-in) (info, published 7 Oct 2026)
- [CVE-2026-16516: wolfSSH ECDSA curve substitution in host key parsing](https://junglewise.ai/threats/cve-2026-16516-wolfssh-does-not-validate-that-the-ecdsa-curve-identifier-in-a) (info, published 7 Oct 2026)

## Most severe Wolfssl wolfSSH vulnerabilities

- [CVE-2026-84897: wolfSSL wolfSSH Diffie-Hellman group exchange message handling bypass](https://junglewise.ai/threats/cve-2026-84897-src-internal-c-in-wolfssl-wolfssh-through-1-5-0-admits-the-server) (info, published 7 Oct 2026)
- [CVE-2026-83742: wolfSSL wolfSSH unsigned integer underflow in wstrncat()](https://junglewise.ai/threats/cve-2026-83742-unsigned-integer-underflow-in-wstrncat-in-src-port-c-in-wolfssl) (info, published 7 Oct 2026)
- [CVE-2026-83540: wolfSSL wolfSSHd Windows logon token release-of-resource vulnerability](https://junglewise.ai/threats/cve-2026-83540-when-password-or-public-key-authentication-is-used-with-the) (info, published 7 Oct 2026)
- [CVE-2026-81535: wolfSSH forwarded-tcpip channel authorization bypass](https://junglewise.ai/threats/cve-2026-81535-in-wolfssh-through-1-5-0-built-with-enable-fwd-dochannelopen-in) (info, published 7 Oct 2026)
- [CVE-2026-16516: wolfSSH ECDSA curve substitution in host key parsing](https://junglewise.ai/threats/cve-2026-16516-wolfssh-does-not-validate-that-the-ecdsa-curve-identifier-in-a) (info, published 7 Oct 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 5 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 5 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Wolfssl technologies

- [wolfSSL](https://junglewise.ai/threats/technologies/wolfssl): 64 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Wolfssl wolfSSH vulnerabilities", https://junglewise.ai/threats/technologies/wolfssl-wolfssh, 9 November 2026.