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16 vulnerabilities by wolfSSL Inc.
CVE-2026-81341 (GCVE-0-2026-81341)
Vulnerability from nvd – Published: 2026-08-28 14:43 – Updated: 2026-08-28 18:17
VLAI
EPSS
VEX
Title
wolfEngine reuses the AES-CCM nonce on TLS 1.2 / DTLS 1.2 records
Summary
wolfEngine before 1.4.1 sources the explicit AES-CCM nonce for TLS 1.2 and DTLS 1.2 records from the record input buffer instead of the TLS sequence number carried in the additional authenticated data. Because the record layer leaves the explicit-nonce field for the cipher to populate, the value read is constant across records, so every AES-CCM record within a connection is encrypted under an identical key and nonce pair. Reusing a CCM key and nonce weakens confidentiality (identical keystream across records, so a known record recovers the others) and integrity (authentication tag forgery). Only wolfEngine is affected; wolfProvider is not. AES-GCM under wolfEngine is tracked separately. AES-CCM cipher suites are not enabled by default and must be explicitly selected, which limits exposure. TLS 1.3 and non-TLS use of the cipher are not affected.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 18:17 UTC
CWE
- CWE-323 - Reusing a Nonce, Key Pair in Encryption
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfEngine |
Affected:
0 , ≤ 1.4.0
(git)
|
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CVE-2026-81020 (GCVE-0-2026-81020)
Vulnerability from nvd – Published: 2026-08-28 14:42 – Updated: 2026-08-28 18:19
VLAI
EPSS
VEX
Title
wolfEngine reuses the AES-GCM nonce on every TLS 1.2 / DTLS 1.2 record
Summary
wolfEngine before 1.4.1 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce discloses the keystream (the XOR of two ciphertexts equals the XOR of their plaintexts, so one known record recovers the others) and leaks the GHASH authentication key, enabling authentication tag forgery. AES-CCM, TLS 1.3, and non-TLS use of the cipher are not affected.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 18:18 UTC
CWE
- CWE-323 - Reusing a Nonce, Key Pair in Encryption
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfEngine |
Affected:
0 , ≤ 1.4.0
(git)
|
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CVE-2026-81019 (GCVE-0-2026-81019)
Vulnerability from nvd – Published: 2026-08-28 14:42 – Updated: 2026-08-28 18:22
VLAI
EPSS
VEX
Title
wolfProvider reuses the AES-GCM nonce on every TLS 1.2 / DTLS 1.2 record
Summary
wolfProvider before 1.2.2 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce discloses the keystream (the XOR of two ciphertexts equals the XOR of their plaintexts, so one known record recovers the others) and leaks the GHASH authentication key, enabling authentication tag forgery. AES-CCM, TLS 1.3, and non-TLS use of the cipher are not affected.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 18:22 UTC
CWE
- CWE-323 - Reusing a Nonce, Key Pair in Encryption
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfProvider |
Affected:
0 , ≤ 1.2.1
(git)
|
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CVE-2026-3849 (GCVE-0-2026-3849)
Vulnerability from nvd – Published: 2026-03-19 20:29 – Updated: 2026-03-25 14:21
VLAI
EPSS
VEX
Title
Buffer Overflow in HPKE via Oversized ECH Config
Summary
Stack Buffer Overflow in wc_HpkeLabeledExtract via Oversized ECH Config. A vulnerability existed in wolfSSL 5.8.4 ECH (Encrypted Client Hello) support, where a maliciously crafted ECH config could cause a stack buffer overflow on the client side, leading to potential remote execution and client program crash. This could be exploited by a malicious TLS server supporting ECH. Note that ECH is off by default, and is only enabled with enable-ech.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-25 14:21 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfSSL |
Affected:
v5.6.0-stable , ≤ v5.8.4-stable
(git)
|
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CVE-2026-3503 (GCVE-0-2026-3503)
Vulnerability from nvd – Published: 2026-03-19 18:12 – Updated: 2026-03-19 19:24
VLAI
EPSS
VEX
Title
Fault injection attack with ML-DSA and ML-KEM on ARM
Summary
Protection mechanism failure in wolfCrypt post-quantum implementations (ML-KEM and ML-DSA) in wolfSSL on ARM Cortex-M microcontrollers allows a physical attacker to compromise key material and/or cryptographic outcomes via induced transient faults that corrupt or redirect seed/pointer values during Keccak-based expansion.
This issue affects wolfSSL (wolfCrypt): commit hash d86575c766e6e67ef93545fa69c04d6eb49400c6.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-19 19:24 UTC
CWE
- CWE-335 - Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/wolfSSL/wolfssl/pull/9734 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfSSL (wolfCrypt) |
Affected:
5.8.2 , < 5.9.0
(semver)
|
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CVE-2025-7844 (GCVE-0-2025-7844)
Vulnerability from nvd – Published: 2025-08-04 21:35 – Updated: 2025-08-05 13:36
VLAI
EPSS
VEX
Title
wolfTPM library wrapper function `wolfTPM2_RsaKey_TpmToWolf` copies external data to a fixed-size stack buffer without length validation potentially causing stack-based buffer overflow
Summary
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SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-05 13:36 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfTPM |
Affected:
0 , ≤ 3.9.2
(git)
|
Date Public
2025-07-18 20:15
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CVE-2024-5288 (GCVE-0-2024-5288)
Vulnerability from nvd – Published: 2024-08-27 18:36 – Updated: 2024-08-27 19:23
VLAI
EPSS
VEX
Title
Safe-error attack on TLS 1.3 Protocol
Summary
An issue was discovered in wolfSSL before 5.7.0. A safe-error attack via Rowhammer, namely FAULT+PROBE, leads to ECDSA key disclosure. When WOLFSSL_CHECK_SIG_FAULTS is used in signing operations with private ECC keys,
such as in server-side TLS connections, the connection is halted if any fault occurs. The success rate in a certain amount of connection requests can be processed via an advanced technique for ECDSA key recovery.
Severity
5.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-27 19:22 UTC
CWE
- CWE-922 - Insecure Storage of Sensitive Information
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfSSL |
Affected:
0 , ≤ 5.7.0
(git)
|
Date Public
2024-07-08 17:30
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CVE-2024-2873 (GCVE-0-2024-2873)
Vulnerability from nvd – Published: 2024-03-25 21:58 – Updated: 2024-08-01 19:50
VLAI
EPSS
VEX
Title
User authentication bypass in wolfSSH server
Summary
A vulnerability was found in wolfSSH's server-side state machine before versions 1.4.17. A malicious client could create channels without first performing user authentication, resulting in unauthorized access.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-01 19:41 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wolfSSL/wolfssh/pull/670 | patch |
| https://github.com/wolfSSL/wolfssh/pull/671 | patch |
| https://www.wolfssl.com/docs/security-vulnerabilities/ | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfSSH |
Affected:
0 , ≤ v1.4.16
(release bundle)
|
|
| wolfssh | wolfssh |
Affected:
0 , < 1.4.16
(custom)
cpe:2.3:a:wolfssh:wolfssh:*:*:*:*:*:*:*:* |
Date Public
2024-03-25 23:00
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CVE-2026-81341 (GCVE-0-2026-81341)
Vulnerability from cvelistv5 – Published: 2026-08-28 14:43 – Updated: 2026-08-28 18:17
VLAI
EPSS
VEX
Title
wolfEngine reuses the AES-CCM nonce on TLS 1.2 / DTLS 1.2 records
Summary
wolfEngine before 1.4.1 sources the explicit AES-CCM nonce for TLS 1.2 and DTLS 1.2 records from the record input buffer instead of the TLS sequence number carried in the additional authenticated data. Because the record layer leaves the explicit-nonce field for the cipher to populate, the value read is constant across records, so every AES-CCM record within a connection is encrypted under an identical key and nonce pair. Reusing a CCM key and nonce weakens confidentiality (identical keystream across records, so a known record recovers the others) and integrity (authentication tag forgery). Only wolfEngine is affected; wolfProvider is not. AES-GCM under wolfEngine is tracked separately. AES-CCM cipher suites are not enabled by default and must be explicitly selected, which limits exposure. TLS 1.3 and non-TLS use of the cipher are not affected.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 18:17 UTC
CWE
- CWE-323 - Reusing a Nonce, Key Pair in Encryption
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfEngine |
Affected:
0 , ≤ 1.4.0
(git)
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CVE-2026-81020 (GCVE-0-2026-81020)
Vulnerability from cvelistv5 – Published: 2026-08-28 14:42 – Updated: 2026-08-28 18:19
VLAI
EPSS
VEX
Title
wolfEngine reuses the AES-GCM nonce on every TLS 1.2 / DTLS 1.2 record
Summary
wolfEngine before 1.4.1 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce discloses the keystream (the XOR of two ciphertexts equals the XOR of their plaintexts, so one known record recovers the others) and leaks the GHASH authentication key, enabling authentication tag forgery. AES-CCM, TLS 1.3, and non-TLS use of the cipher are not affected.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 18:18 UTC
CWE
- CWE-323 - Reusing a Nonce, Key Pair in Encryption
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfEngine |
Affected:
0 , ≤ 1.4.0
(git)
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CVE-2026-81019 (GCVE-0-2026-81019)
Vulnerability from cvelistv5 – Published: 2026-08-28 14:42 – Updated: 2026-08-28 18:22
VLAI
EPSS
VEX
Title
wolfProvider reuses the AES-GCM nonce on every TLS 1.2 / DTLS 1.2 record
Summary
wolfProvider before 1.2.2 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce discloses the keystream (the XOR of two ciphertexts equals the XOR of their plaintexts, so one known record recovers the others) and leaks the GHASH authentication key, enabling authentication tag forgery. AES-CCM, TLS 1.3, and non-TLS use of the cipher are not affected.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 18:22 UTC
CWE
- CWE-323 - Reusing a Nonce, Key Pair in Encryption
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfProvider |
Affected:
0 , ≤ 1.2.1
(git)
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CVE-2026-3849 (GCVE-0-2026-3849)
Vulnerability from cvelistv5 – Published: 2026-03-19 20:29 – Updated: 2026-03-25 14:21
VLAI
EPSS
VEX
Title
Buffer Overflow in HPKE via Oversized ECH Config
Summary
Stack Buffer Overflow in wc_HpkeLabeledExtract via Oversized ECH Config. A vulnerability existed in wolfSSL 5.8.4 ECH (Encrypted Client Hello) support, where a maliciously crafted ECH config could cause a stack buffer overflow on the client side, leading to potential remote execution and client program crash. This could be exploited by a malicious TLS server supporting ECH. Note that ECH is off by default, and is only enabled with enable-ech.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-25 14:21 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfSSL |
Affected:
v5.6.0-stable , ≤ v5.8.4-stable
(git)
|
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CVE-2026-3503 (GCVE-0-2026-3503)
Vulnerability from cvelistv5 – Published: 2026-03-19 18:12 – Updated: 2026-03-19 19:24
VLAI
EPSS
VEX
Title
Fault injection attack with ML-DSA and ML-KEM on ARM
Summary
Protection mechanism failure in wolfCrypt post-quantum implementations (ML-KEM and ML-DSA) in wolfSSL on ARM Cortex-M microcontrollers allows a physical attacker to compromise key material and/or cryptographic outcomes via induced transient faults that corrupt or redirect seed/pointer values during Keccak-based expansion.
This issue affects wolfSSL (wolfCrypt): commit hash d86575c766e6e67ef93545fa69c04d6eb49400c6.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-19 19:24 UTC
CWE
- CWE-335 - Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/wolfSSL/wolfssl/pull/9734 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfSSL (wolfCrypt) |
Affected:
5.8.2 , < 5.9.0
(semver)
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CVE-2025-7844 (GCVE-0-2025-7844)
Vulnerability from cvelistv5 – Published: 2025-08-04 21:35 – Updated: 2025-08-05 13:36
VLAI
EPSS
VEX
Title
wolfTPM library wrapper function `wolfTPM2_RsaKey_TpmToWolf` copies external data to a fixed-size stack buffer without length validation potentially causing stack-based buffer overflow
Summary
Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default `MAX_RSA_KEY_BITS=2048` is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls `wolfTPM2_RsaKey_TpmToWolf` on that key, then a stack buffer could be overrun. If the `MAX_RSA_KEY_BITS` build-time macro is set correctly (RSA bits match what TPM hardware is capable of) for the hardware target, then a stack overrun is not possible.
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-05 13:36 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfTPM |
Affected:
0 , ≤ 3.9.2
(git)
|
Date Public
2025-07-18 20:15
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CVE-2024-5288 (GCVE-0-2024-5288)
Vulnerability from cvelistv5 – Published: 2024-08-27 18:36 – Updated: 2024-08-27 19:23
VLAI
EPSS
VEX
Title
Safe-error attack on TLS 1.3 Protocol
Summary
An issue was discovered in wolfSSL before 5.7.0. A safe-error attack via Rowhammer, namely FAULT+PROBE, leads to ECDSA key disclosure. When WOLFSSL_CHECK_SIG_FAULTS is used in signing operations with private ECC keys,
such as in server-side TLS connections, the connection is halted if any fault occurs. The success rate in a certain amount of connection requests can be processed via an advanced technique for ECDSA key recovery.
Severity
5.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-27 19:22 UTC
CWE
- CWE-922 - Insecure Storage of Sensitive Information
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfSSL |
Affected:
0 , ≤ 5.7.0
(git)
|
Date Public
2024-07-08 17:30
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CVE-2024-2873 (GCVE-0-2024-2873)
Vulnerability from cvelistv5 – Published: 2024-03-25 21:58 – Updated: 2024-08-01 19:50
VLAI
EPSS
VEX
Title
User authentication bypass in wolfSSH server
Summary
A vulnerability was found in wolfSSH's server-side state machine before versions 1.4.17. A malicious client could create channels without first performing user authentication, resulting in unauthorized access.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-01 19:41 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wolfSSL/wolfssh/pull/670 | patch |
| https://github.com/wolfSSL/wolfssh/pull/671 | patch |
| https://www.wolfssl.com/docs/security-vulnerabilities/ | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| wolfSSL Inc. | wolfSSH |
Affected:
0 , ≤ v1.4.16
(release bundle)
|
|
| wolfssh | wolfssh |
Affected:
0 , < 1.4.16
(custom)
cpe:2.3:a:wolfssh:wolfssh:*:*:*:*:*:*:*:* |
Date Public
2024-03-25 23:00
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