A vulnerability in a proprietary device driver in the kernel of Cisco TelePresence Multipoint Control Unit (MCU) Software could allow an una
A vulnerability in a proprietary device driver in the kernel of Cisco TelePresence Multipoint Control Unit (MCU) Software could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition. The vulnerability is due to improper size validation when reassembling fragmented IPv4 or IPv6 packets. An attacker could exploit this vulnerability by sending crafted IPv4 or IPv6 fragments to a port receiving content in Passthrough content mode. An exploit could allow the attacker to overflow a buffer. If successful, the attacker could execute arbitrary code or cause a DoS condition on the affected system. Cisco TelePresence MCU platforms TelePresence MCU 5300 Series, TelePresence MCU MSE 8510 and TelePresence MCU 4500 are affected when running software version 4.3(1.68) or later configured for Passthrough content mode. Cisco has released software updates that address this vulnerability. Workarounds that address this vulnerability are not available, but mitigations are available. Cisco Bug IDs: CSCuu67675.
- Published
- Feb 1, 2017
- Updated
- Jun 16, 2026
- EPSS
- 6.8% · 94th percentile
- CWE
- CWE-20
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Report tools
Action score
41
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 6.8%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| cisco | telepresence mcu software | cpe:2.3:a:cisco:telepresence_mcu_software |
| cisco | telepresence mcu 4505 | cpe:2.3:h:cisco:telepresence_mcu_4505 |
| cisco | telepresence mcu 4510 | cpe:2.3:h:cisco:telepresence_mcu_4510 |
| cisco | telepresence mcu 4515 | cpe:2.3:h:cisco:telepresence_mcu_4515 |
| cisco | telepresence mcu 4520 | cpe:2.3:h:cisco:telepresence_mcu_4520 |
| cisco | telepresence mcu 5310 | cpe:2.3:h:cisco:telepresence_mcu_5310 |
| cisco | telepresence mcu 5320 | cpe:2.3:h:cisco:telepresence_mcu_5320 |
| cisco | telepresence mcu mse 8510 | cpe:2.3:h:cisco:telepresence_mcu_mse_8510 |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- cisco telepresence mcu software4.3_(1.68)
- cisco telepresence mcu software4.3_(2.18)
- cisco telepresence mcu software4.3_(2.30)
- cisco telepresence mcu software4.3_(2.32)
- cisco telepresence mcu software4.4_(3.42)
- cisco telepresence mcu software4.4_(3.49)
- cisco telepresence mcu software4.4_(3.54)
- cisco telepresence mcu software4.4_(3.57)
- cisco telepresence mcu software4.4_(3.67)
- cisco telepresence mcu software4.5_(1.45)
- cisco telepresence mcu software4.5_(1.55)
- cisco telepresence mcu software4.5_(1.71)
- cisco telepresence mcu software4.5_(1.72)
- cisco telepresence mcu software4.5_(1.85)
Versions reported by the vendor
Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.
n/a Cisco TelePresence Multipoint Control Unit (MCU) software version 4.3(1.68) or later configured for Passthrough content mode
- Cisco TelePresence Multipoint Control Unit (MCU) software version 4.3(1.68) or later configured for Passthrough content modeaffected
Same product
cisco: all recordsOther highest-scoring records for the same primary product.
- CVE-2014-3397The network stack in Cisco TelePresence MCU Software before 4.3(2.30) allows remote attackers to cause a denial of service (memory consumpti32Monitor
- CVE-2015-4257Cross-site request forgery (CSRF) vulnerability on Cisco TelePresence MCU 4500 devices with software 4.5(1.55) allows remote attackers to hi27Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.securityfocus.com/bid/95787
- www.securitytracker.com/id/1037698
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170125-telepresence
Vendor advisories and official records. Exploit/PoC links are deliberately left out.