Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-66032

Libssh2 Vulnerability in NetApp Products

CVE-2026-66032: Libssh2 Vulnerability in NetApp Products. Not in the CISA KEV catalog. High advisory severity (CVSS 8.7, NetApp).

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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CVE-2026-66032 key facts

CISA KEV: Not listed (catalog checked Oct 30, 2026)
Highest advisory severity: High
CVSS base score: 8.7 (NetApp), 6.5 (Red Hat)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (Red Hat)
Weakness: CWE-1341
Fixed releases: Red Hat: 1.11.1, libssh2-0:1.8.0-4.el7_9.2, libssh2-main-1.11.1-10.2.hum1, RHSA-2026:61752, RHSA-2026:46927
Vendor advisories: 2 from NetApp, Red Hat
VulniPulse record: Published Jul 28, 2026 · Updated Oct 5, 2026

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-66032; bulletin-wide values are not repeated here.

Is CVE-2026-66032 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-66032 is not in the CISA KEV catalog (checked Oct 30, 2026) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-66032?

Upgrade to a fixed release named by the vendor:

Red Hat: 1.11.1, libssh2-0:1.8.0-4.el7_9.2, libssh2-main-1.11.1-10.2.hum1, RHSA-2026:61752, RHSA-2026:46927

Restrict your libssh2 clients to connect only to fully trusted, internal SFTP servers to eliminate exposure to malicious server responses. Additionally, configure dependent applications with Restart=on-failure in systemd so RHEL's glibc memory protections can safely crash and auto-recover the process during an attack. (Red Hat)

Vendor advisory comparison

NetApp

1 advisory

Advisory severityHigh8.7
High [CVE-2026-66032] Libssh2 Vulnerability in NetApp Products
NTAP-20260807-0001Source published Aug 7, 2026Source updated Oct 5, 2026
Libssh2 versions through 1.11.1 are susceptible to a vulnerability which when successfully exploited could lead to disclosure of sensitive information, addition or modification of data, or Denial of Service (DoS). Affected products: Active IQ Unified Manager for VMware vSphere, ONTAP Select Deploy administration utility. NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.
Affected products in this advisory
Active IQ Unified Manager for VMware vSphere
ONTAP Select Deploy administration utility
Source-reported affected versions
1.11.1
Source-reported fixed versions
No fixed-version detail extracted. This does not mean no fix exists.
Mitigation guidance
No mitigation guidance extracted; consult the source.
Full advisory and evidence Open source bulletin

Red Hat

1 advisory

Advisory severityMedium6.5
Medium [CVE-2026-66032] Arbitrary code execution via double-free in SFTP session
CVE-2026-66032Source published Jul 24, 2026Source updated Jul 24, 2026
libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftp_open() function in src/sftp.c that allows a malicious SSH server to corrupt the heap of any authenticated client opening an SFTP session. When a server responds to SSH_FXP_OPEN with SSH_FXP_STATUS containing FX_OK, the response data buffer is freed, and if a subsequent sftp_packet_require() call returns a specific error such as LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED, the same pointer is freed a second time, enabling tcache dup conditions on glibc systems that allow overlapping allocations and function pointer overwrites. A flaw was found in libssh2. This heap corruption can lead to arbitrary code execution on the client system, giving the attacker control over the affected system. This flaw…
Affected products in this advisory
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Red Hat Hardened Images
Red Hat Enterprise Linux 6
Red Hat package: libssh2
Source-reported affected versions
Affected-version details not available in this record.
Source-reported fixed versions
1.11.1
libssh2-0:1.8.0-4.el7_9.2
libssh2-main-1.11.1-10.2.hum1
RHSA-2026:61752
1 more entries in the full advisory.
Mitigation guidance
Restrict your libssh2 clients to connect only to fully trusted, internal SFTP servers to eliminate exposure to malicious server responses. Additionally, configure dependent applications with Restart=on-failure in systemd so RHEL's glibc memory protections can safely crash and auto-recover the process during an attack.
Full advisory and evidence Open source bulletin

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