CVE-2011-3478

HIGHCVSS v2 · 10.010.0—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 10.0 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:L/Au:N/C:C/I:C/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 39.3% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Weaponized
10.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Exploit-DB (verified), epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 39%CVSS v2: 10.0Exploit: Exploit-DB (verified) · epss top5pct · public exploitExposed: 0

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

The host-services component in Symantec pcAnywhere 12.5.x through 12.5.3, and IT Management Suite pcAnywhere Solution 7.0 (aka 12.5.x) and 7.1 (aka 12.6.x), does not properly filter login and authentication data, which allows remote attackers to execute arbitrary code via a crafted session on TCP port 5631.

CVSS v2.0 (legacy)
10.0HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
10.0(low)
EG Risk
76(Track)
EG Risk 76/100SSVC: Track

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
Severity100% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
39%
EPSS %ILE
98%
KEV
Not listed

Published

January 25, 2012

Last Modified

April 29, 2026

References (12)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 29× 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.

  1. 2026-07-26 13:43 UTCEG score recompute▲ 10.00
  2. 2026-07-23 14:14 UTCEPSS rescore
  3. 2026-07-23 01:05 UTCEG score recompute▼ 1.50
  4. 2026-07-23 00:09 UTCEG score recompute▲ 1.50
  5. 2026-07-22 21:48 UTCEG score recompute
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  49. 2026-05-29 05:39 UTCEG score recompute
  50. 2026-05-29 05:39 UTCGHSA enrichment
  51. 2026-05-28 13:42 UTCEPSS rescore
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Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-38599✓ verified
    First seen Nov 2, 2015

    Symantec pcAnywhere 12.5.0 (Windows x86) - Remote Code Execution

    Open source ↗
  • Exploit-DBEDB-19407✓ verified
    First seen Jun 27, 2012

    Symantec pcAnywhere 12.5.0 - 'Login' / 'Password' Remote Buffer Overflow

    Open source ↗

Frequently asked(4)

What is CVE-2011-3478?
CVE-2011-3478 is a high vulnerability published on January 25, 2012. The host-services component in Symantec pcAnywhere 12.5.x through 12.5.3, and IT Management Suite pcAnywhere Solution 7.0 (aka 12.5.x) and 7.1 (aka 12.6.x), does not properly filter login and authentication data, which allows remote attackers to execute arbitrary code via a crafted session on TCP…
When was CVE-2011-3478 disclosed?
CVE-2011-3478 was first published in the National Vulnerability Database on January 25, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-3478 actively exploited?
CVE-2011-3478 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 39% probability of exploitation in the next 30 days, which ranks it in the top 1.5% of all scored CVEs.
How do I remediate CVE-2011-3478?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-3478, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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