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Erlang/OTP snmp EUVDEUVD-2026-69246

| CVE-2026-70405 MEDIUM
Improper Validation of Specified Quantity in Input (CWE-1284)
2026-09-01 EEF
Otp Erlang
6.3
CVSS 4.0 · Vendor: EEF
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Severity by source

Vendor (EEF) PRIMARY
6.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
7.5 HIGH

AV:N for UDP network delivery; PR:N since SNMPv1/v2c community strings are access control not authentication under CVSS; A:H for superlinear CPU exhaustion achievable from a single crafted packet.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
3.7 LOW
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Primary rating from Vendor (EEF).

CVSS VectorVendor: EEF

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Metadata Corrected
Sep 01, 2026 - 16:40 vuln.today
tag: Information Disclosure replaced by Denial Of Service
Source Code Evidence Fetched
Sep 01, 2026 - 15:51 vuln.today
Analysis Generated
Sep 01, 2026 - 15:51 vuln.today

DescriptionCVE.org

Improper Validation of Specified Quantity in Input vulnerability in Erlang/OTP snmp allows a remote attacker to degrade availability by sending an SNMP message containing a BER INTEGER whose length field is arbitrarily large.

snmp_pdus:dec_integer_notag/1 defaults its size limit to infinity, and do_dec_integer_notag/2 then accumulates the value across every declared byte with a recursive shift and bitwise or. Work grows superlinearly in the declared length because each operation acts on a progressively larger bignum. The size-limited variant dec_integer_notag/2 exists but is reached from only one call site, dec_snmp_version/1, which bounds the version field to ten bytes; the request identifier, error status and index, generic and specific trap fields, engine boots and time, and every varbind value decoded by dec_value/1 all use the unbounded form. The decode runs before the PDU is processed, so no valid request is required beyond what the deployment demands to accept the message at all.

This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to snmp from 4.25.1 before 5.18.2.1, from 5.19 before 5.20.2.2, and from 5.20.3 before 5.20.5. Whether OTP before OTP 17.0, corresponding to snmp before 4.25.1, is affected is unknown.

AnalysisAI

Algorithmic complexity denial-of-service in Erlang/OTP's SNMP library allows remote, unauthenticated attackers on SNMPv1/v2c deployments to exhaust CPU by sending a single crafted PDU containing a BER INTEGER whose length field is set arbitrarily large. The unbounded function snmp_pdus:dec_integer_notag/1 performs recursive bignum accumulation across every declared byte before any PDU validation or community string enforcement occurs, so work grows superlinearly with the declared length value and a single UDP packet can lock the SNMP agent indefinitely. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires network-level access to UDP port 161 on a host running an affected Erlang/OTP SNMP agent. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 4.0 score of 6.3 (AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N) reflects a network-exploitable, unauthenticated availability issue rated at low impact with no confidentiality or integrity dimension. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to a fixed OTP release: OTP 27.3.4.17 or later (snmp >= 5.18.2.1), OTP 28.5.0.6 or later (snmp >= 5.20.2.2), or OTP 29.0.6 or later (snmp >= 5.20.5). … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Low
Product Status
SUSE Linux Enterprise Module for Server Applications 15 SP7 Affected
SUSE Linux Enterprise Module for Server Applications 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server 16.0 Affected

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EUVD-2026-69246 vulnerability details – vuln.today
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