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== Assessment scope == Documentation-based historical Enterprise deployment: Cisco 7821, firmware 12.8.1-0001-455 exactly tested by SEC Consult in 2021 and disclosed 13 January 2022. Define CUCM 12.5(1)SU3, a nonsecure call profile, a unique administrator-provisioned Phone Password for this phone, and Extension Mobility PINs governed by configured CUCM lockout. These deployment choices are documented capabilities, not SEC Consult's complete observed setup or factory defaults. Local phone and central CUCM credentials are assessed as separate boundaries. No physical installation or test was performed by the author. == Method and evidence boundaries == This is a documentary case-study assessment of the exact hardware, firmware and explicitly stated configuration, reviewed on 24 October 2026. No physical installation, penetration test or traffic capture by the author is claimed. Historical flaws do not establish current unpatched exposure. The website supplies qualitative categories rather than statistical thresholds: repeated real maintenance supports Updatability 1; isolated/uncertain maintenance supports2; a documented no-update condition supports3. Vulnerability/attack frequency labels are reasoned judgments, and a laboratory demonstration is not an observed campaign. None for prior attacks means no exact-model field campaign established in the reviewed sources, not proof of lifetime absence. Communications follows the least-protected enabled path carrying control, credentials or application payloads; a DNS/discovery packet alone is not used to label an entire device unencrypted. Storage evaluates confidential device-resident flash contents, not merely cloud security or whether executable firmware is readable. For Passwords, the methodology discusses first-setup credentials and expressly allows unique initial passwords. Where mandatory first-use creation or explicitly configured unique credentials do not match a shared-default-change label literally, option2 is a disclosed functional mapping, not a claim of forced periodic rotation. Option1 additionally requires enforced complexity; option3 requires positive evidence of common, predictable or unprotected access. Dates preserve the identified manufacturer announcement/availability or clearly identified primary regional catalog basis. No arbitrary first-of-month date is inserted. The calculated IDRS device grade is not a manufacturer certification or a student assignment mark. Calculated IDRS: 2 + 3 + 2 = 7 (C). Date basis: Cisco France's dated 8 November 2013 product announcement explicitly names 7821 and states the three new phones are available today. This record uses that regional official announcement/availability day, not a claimed worldwide first-sale day; the separate series support page lists 22 October 2013. Date source: https://gblogs.cisco.com/fr/collaboration/cisco-devoile-la-gamme-de-telephones-cisco-ip-phone-7800/ Product-specific boundaries: This is an Enterprise CUCM literature configuration; MPP defaults and manuals do not apply. The physical flash finding was repaired in later firmware; the grade is for the specified historical image. The installation-unique phone password and CUCM lockout are explicit assessment conditions, not claimed factory defaults or SEC Consult's complete test setup. Password2 is the disclosed unique-credential operational interpretation of the site prose; its dropdown label is not presented as literal enforced password rotation. The official8 November 2013 France announcement supplies an exact, clearly scoped availability/announcement date. == Hardware and general-information supplement == Supplement reviewed on 25 October 2026. Manufacturer model specifications and explicitly identified historical manuals support the added fields. Hardware capabilities do not imply that optional services, accessories or every capacity variant are enabled in the assessed case. Unpublished or unverified parameters are identified rather than guessed. Current sale/support status is separate from the original historical firmware/configuration assessment; the twelve security selections and original evidence have not been changed. === Specification evidence === * Generation, Dimensions, Mass, CPU, GPU, Memory, Display, Sound: [https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-7800-series/data-sheet-c78-729488.html source 1]. * Status: [https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-7800-series/ip-phone-7821-eol.html source 1]. * Operating system: [https://seclists.org/fulldisclosure/2022/Jan/34 source 1]. * Companion App: [https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/7800-series/english/admin-guide/pa2d_b_7800-series-admin-guide-cucm/pa2d_b_7800-series-admin-guide-cucm_chapter_0110.html source 1]. * Storage: [https://seclists.org/fulldisclosure/2022/Jan/34 source 1]; [https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-7800-series/data-sheet-c78-729488.html source 2]. * Battery, Charging: [https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/7800-series/english/admin-guide/pa2d_b_7800-series-admin-guide-cucm/pa2d_b_7800-series-admin-guide-cucm_chapter_010.html source 1]. * Power, Camera, Connectivity: [https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-7800-series/data-sheet-c78-729488.html source 1]; [https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/7800-series/english/admin-guide/pa2d_b_7800-series-admin-guide-cucm/pa2d_b_7800-series-admin-guide-cucm_chapter_010.html source 2]. === Specification qualifications === * The assessed firmware is Enterprise SIP 12.8.1-0001-455, rather than Multiplatform Phone firmware. * Unpublished processor and memory-capacity details are treated as unknown, not as absent hardware. * Current In sale status is bounded by the official last-order date 28 October 2026; last support is 31 October 2031. Announcement of lifecycle milestones is not already-completed end of support.
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