CVE-2026-22321 | THREATINT

Description

A stack-based buffer overflow in the device's Telnet/SSH CLI login routine occurs when a unauthenticated attacker send an oversized or unexpected username input. An overflow condition crashes the thread handling the login attempt, forcing the session to close. Because other CLI sessions remain unaffected, the impact is limited to a low‑severity availability disruption.

PUBLISHED Reserved 2026-01-07 | Published 2026-03-18 | Updated 2026-03-18 | Assigner CERTVDE

MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem types

CWE-121 Stack-based Buffer Overflow

Product status

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affected

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affected

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affected

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affected

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affected

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unaffected

0.0.0 (semver) before 3.53

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affected

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affected

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unaffected

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affected

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unaffected

0.0.0 (semver) before 3.53

affected

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unaffected

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affected

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unaffected

0.0.0 (semver) before 3.53

affected

Default status

unaffected

0.0.0 (semver) before 3.53

affected

Default status

unaffected

0.0.0 (semver) before 3.53

affected

Default status

unaffected

0.0.0 (semver) before 3.53

affected

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unaffected

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affected

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unaffected

0.0.0 (semver) before 3.53

affected

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unaffected

0.0.0 (semver) before 3.53

affected

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unaffected

0.0.0 (semver) before 3.53

affected

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unaffected

0.0.0 (semver) before 3.53

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affected

Credits

Gabriele Quagliarella from Nozomi Networks finder

References

certvde.com/de/advisories/VDE-2025-104

cve.org (CVE-2026-22321)

nvd.nist.gov (CVE-2026-22321)

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