Is there a public exploit for CVE-2026-70405?

No public exploit for CVE-2026-70405 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-70405?

CVE-2026-70405 scores CVSS 6.3 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.71%.

What does CVE-2026-70405 affect?

CVE-2026-70405 affects erlang otp.

6.3 Medium

Improper Validation of Specified Quantity in Input vulnerability in Erlang/OTP snmp allows a remote attacker to degrade availability by…

CVE-2026-70405

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. snmppdus:decintegernotag/1 defaults its size limit to infinity, and dodecintegernotag/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 decintegernotag/2 exists but is reached from only one call site, decsnmpversion/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 decvalue/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, OTP 28.5.0.6, and OTP 29.0.6, corresponding to snmp from 4.25.1 before 5.18.2.1, 5.20.2.2, and 5.20.5. Whether OTP before OTP 17.0, corresponding to…

Assessment

CVSS: 6.3 (v4.0)
Severity: Medium
EPSS: 0.71% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 1 September 2026
Last updated: 11 November 2026
Affected: erlang · otp
Assigner: EEF

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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