Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-55737

Denial of Service via crafted external term format binary

CVE-2026-55737: Denial of Service via crafted external term format binary. Not in the CISA KEV catalog. High advisory severity (CVSS 7.5, Red Hat).

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-2026-55737 key facts

CISA KEV: Not listed (catalog checked Oct 30, 2026)
Highest advisory severity: High
CVSS base score: 7.5 (Red Hat), 5.1 (NetApp)
Vendor advisories: 2 from NetApp, Red Hat
VulniPulse record: Published Jul 30, 2026 · Updated Oct 9, 2026

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-55737; bulletin-wide values are not repeated here.

Is CVE-2026-55737 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-55737 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-2026-55737?

The tracked advisories that cover only this CVE do not list a fixed release yet. That does not mean no fix exists; check each vendor source below.

Vendor advisory comparison

NetApp

1 advisory

Advisory severityMedium5.1
Medium [CVE-2026-55737] Erlang/OTP Vulnerability in NetApp Products
NTAP-20261009-0018Source published Oct 9, 2026Source updated Oct 9, 2026
Erlang/OTP versions 25.0 through 27.3.4.14, 28.0 through 28.5.0.3 and 29.0 through 29.0.3 are susceptible to a vulnerability which when successfully exploited could lead to Denial of Service (DoS). Successful exploitation of this vulnerability could lead to Denial of Service (DoS). Affected products: 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
ONTAP Select Deploy administration utility
Source-reported affected versions
25.0
27.3.4.14
28.0
28.5.0.3
2 more entries in the full advisory.
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 severityHigh7.5
High [CVE-2026-55737] Denial of Service via crafted external term format binary
CVE-2026-55737Source published Jul 27, 2026Source updated Jul 27, 2026
Signed to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP erts allows an attacker who can supply a crafted Erlang external term format (ETF) binary to binary_to_term/1 to corrupt the BEAM heap pointer and crash the virtual machine. When decoding a LARGE_TUPLE_EXT term, the validation pass decoded_size() in erts/emulator/beam/external.c reads the 32-bit arity field as unsigned (get_uint32()), while the decode pass dec_term() reads the same field as a signed 32-bit integer (get_int32()) into an int. An arity wire value of 0x80000000 passes validation as 2147483648 but decodes as -2147483648, so the subsequent hp += n moves the heap allocation pointer backward. Neither pass enforces the runtime tuple-arity limit MAX_ARITYVAL. The result is an out-of-bounds heap…
Affected products in this advisory
No product details extracted. Check the source bulletin.
Source-reported affected versions
< 25.0
< 29.0.4
< 28.5.0.4
< 27.3.4.15
4 more entries in the full advisory.
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

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