CVE-2016-5080

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 10%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

Integer overflow in the rtxMemHeapAlloc function in asn1rt_a.lib in Objective Systems ASN1C for C/C++ before 7.0.2 allows context-dependent attackers to execute arbitrary code or cause a denial of service (heap-based buffer overflow), on a system running an application compiled by ASN1C, via crafted ASN.1 data.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
10%
EPSS %ILE
95th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 19, 2016

Last Modified

June 17, 2026

Advisory Details (9)

Auto-updated Sep 30, 2026
No fix on record yet. Sources: cert.
generic

Android Security Bulletin—January 2017  |  Android Open Source Project

https://source.android.com/security/bulletin/2017-01-01.html
generic

security-advisories/ObjSys/CVE-2016-5080 at master · programa-stic/security-advisories · GitHub

https://github.com/programa-stic/security-advisories/tree/master/ObjSys/CVE-2016-5080
generic

CVE-2016-5080 - PSIRT.COM

http://www.securityfocus.com/bid/91836
generic

SecurityFocus

http://www.securityfocus.com/archive/1/538952/100/0/threaded
cert

VU#790839 - Objective Systems ASN1C generates code that contains a heap overflow vulnerability

http://www.kb.cert.org/vuls/id/790839
generic

Vulnerability in Objective Systems ASN1C Compiler Affecting Cisco Products

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160721-asn1c
generic

Full Disclosure: CVE-2016-5080: Memory corruption in code generated by Objective Systems Inc. ASN1C compiler for C/C++ [STIC-2016-0603]

http://seclists.org/fulldisclosure/2016/Jul/65
generic

Packet Storm - Human Validation

http://packetstormsecurity.com/files/137970/Objective-Systems-Inc.-ASN1C-For-C-C-Heap-Memory-Corruption.html
generic
http://www.securitytracker.com/id/1036386

Data Freshness Timeline

(refreshed 5× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 145 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
  2. 2026-10-03 14:21 UTCEPSS rescore
  3. 2026-10-01 19:43 UTCEPSS rescore
  4. 2026-09-30 14:58 UTCEPSS rescore
  5. 2026-09-30 09:14 UTCEG score recompute
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  1. 2026-08-23 00:13 UTCEPSS rescore
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  24. 2026-07-23 01:23 UTCEG score recompute
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  26. 2026-07-22 14:04 UTCEPSS rescore
  27. 2026-07-21 15:21 UTCEPSS rescore
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  75. 2026-06-15 17:45 UTCEPSS rescore

Frequently asked(5)

What is CVE-2016-5080?
CVE-2016-5080 is a critical vulnerability published on July 19, 2016. Integer overflow in the rtxMemHeapAlloc function in asn1rt_a.lib in Objective Systems ASN1C for C/C++ before 7.0.2 allows context-dependent attackers to execute arbitrary code or cause a denial of service (heap-based buffer overflow), on a system running an application compiled by ASN1C, via…
When was CVE-2016-5080 disclosed?
CVE-2016-5080 was first published on July 19, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-5080 actively exploited?
CVE-2016-5080 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10% probability of exploitation in the next 30 days (95th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-5080?
CVE-2016-5080 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-5080?
No fix for CVE-2016-5080 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

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